81072180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1$

素因数の和:143

約数の個数: 216

約数和(自身を含む): 294997248

約数和(自身を除く): 213925068

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 37, 42, 45, 47, 60, 63, 70, 74, 84, 90, 94, 105, 111, 126, 140, 141, 148, 180, 185, 188, 210, 222, 235, 252, 259, 282, 315, 329, 333, 370, 420, 423, 444, 470, 518, 555, 564, 630, 658, 666, 705, 740, 777, 846, 940, 987, 1036, 1110, 1260, 1295, 1316, 1332, 1369, 1410, 1554, 1645, 1665, 1692, 1739, 1974, 2115, 2220, 2331, 2590, 2738, 2820, 2961, 3108, 3290, 3330, 3478, 3885, 3948, 4107, 4230, 4662, 4935, 5180, 5217, 5476, 5922, 6580, 6660, 6845, 6956, 7770, 8214, 8460, 8695, 9324, 9583, 9870, 10434, 11655, 11844, 12173, 12321, 13690, 14805, 15540, 15651, 16428, 17390, 19166, 19740, 20535, 20868, 23310, 24346, 24642, 26085, 27380, 28749, 29610, 31302, 34780, 36519, 38332, 41070, 46620, 47915, 48692, 49284, 52170, 57498, 59220, 60865, 61605, 62604, 64343, 73038, 78255, 82140, 86247, 95830, 104340, 109557, 114996, 121730, 123210, 128686, 143745, 146076, 156510, 172494, 182595, 191660, 193029, 219114, 243460, 246420, 257372, 287490, 313020, 321715, 344988, 365190, 386058, 431235, 438228, 450401, 547785, 574980, 579087, 643430, 730380, 772116, 862470, 900802, 965145, 1095570, 1158174, 1286860, 1351203, 1724940, 1801604, 1930290, 2191140, 2252005, 2316348, 2702406, 2895435, 3860580, 4053609, 4504010, 5404812, 5790870, 6756015, 8107218, 9008020, 11581740, 13512030, 16214436, 20268045, 27024060, 40536090, 81072180]

約数ペア:

[(1, 81072180), (2, 40536090), (3, 27024060), (4, 20268045), (5, 16214436), (6, 13512030), (7, 11581740), (9, 9008020), (10, 8107218), (12, 6756015), (14, 5790870), (15, 5404812), (18, 4504010), (20, 4053609), (21, 3860580), (28, 2895435), (30, 2702406), (35, 2316348), (36, 2252005), (37, 2191140), (42, 1930290), (45, 1801604), (47, 1724940), (60, 1351203), (63, 1286860), (70, 1158174), (74, 1095570), (84, 965145), (90, 900802), (94, 862470), (105, 772116), (111, 730380), (126, 643430), (140, 579087), (141, 574980), (148, 547785), (180, 450401), (185, 438228), (188, 431235), (210, 386058), (222, 365190), (235, 344988), (252, 321715), (259, 313020), (282, 287490), (315, 257372), (329, 246420), (333, 243460), (370, 219114), (420, 193029), (423, 191660), (444, 182595), (470, 172494), (518, 156510), (555, 146076), (564, 143745), (630, 128686), (658, 123210), (666, 121730), (705, 114996), (740, 109557), (777, 104340), (846, 95830), (940, 86247), (987, 82140), (1036, 78255), (1110, 73038), (1260, 64343), (1295, 62604), (1316, 61605), (1332, 60865), (1369, 59220), (1410, 57498), (1554, 52170), (1645, 49284), (1665, 48692), (1692, 47915), (1739, 46620), (1974, 41070), (2115, 38332), (2220, 36519), (2331, 34780), (2590, 31302), (2738, 29610), (2820, 28749), (2961, 27380), (3108, 26085), (3290, 24642), (3330, 24346), (3478, 23310), (3885, 20868), (3948, 20535), (4107, 19740), (4230, 19166), (4662, 17390), (4935, 16428), (5180, 15651), (5217, 15540), (5476, 14805), (5922, 13690), (6580, 12321), (6660, 12173), (6845, 11844), (6956, 11655), (7770, 10434), (8214, 9870), (8460, 9583), (8695, 9324)]