21181020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:132

約数の個数: 192

約数和(自身を含む): 73543680

約数和(自身を除く): 52362660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 29, 30, 35, 37, 42, 47, 58, 60, 70, 74, 84, 87, 94, 105, 111, 116, 140, 141, 145, 148, 174, 185, 188, 203, 210, 222, 235, 259, 282, 290, 329, 348, 370, 406, 420, 435, 444, 470, 518, 555, 564, 580, 609, 658, 705, 740, 777, 812, 870, 940, 987, 1015, 1036, 1073, 1110, 1218, 1295, 1316, 1363, 1410, 1554, 1645, 1739, 1740, 1974, 2030, 2146, 2220, 2436, 2590, 2726, 2820, 3045, 3108, 3219, 3290, 3478, 3885, 3948, 4060, 4089, 4292, 4935, 5180, 5217, 5365, 5452, 6090, 6438, 6580, 6815, 6956, 7511, 7770, 8178, 8695, 9541, 9870, 10434, 10730, 12173, 12180, 12876, 13630, 15022, 15540, 16095, 16356, 17390, 19082, 19740, 20445, 20868, 21460, 22533, 24346, 26085, 27260, 28623, 30044, 32190, 34780, 36519, 37555, 38164, 40890, 45066, 47705, 48692, 50431, 52170, 57246, 60865, 64380, 73038, 75110, 81780, 90132, 95410, 100862, 104340, 112665, 114492, 121730, 143115, 146076, 150220, 151293, 182595, 190820, 201724, 225330, 243460, 252155, 286230, 302586, 353017, 365190, 450660, 504310, 572460, 605172, 706034, 730380, 756465, 1008620, 1059051, 1412068, 1512930, 1765085, 2118102, 3025860, 3530170, 4236204, 5295255, 7060340, 10590510, 21181020]

約数ペア:

[(1, 21181020), (2, 10590510), (3, 7060340), (4, 5295255), (5, 4236204), (6, 3530170), (7, 3025860), (10, 2118102), (12, 1765085), (14, 1512930), (15, 1412068), (20, 1059051), (21, 1008620), (28, 756465), (29, 730380), (30, 706034), (35, 605172), (37, 572460), (42, 504310), (47, 450660), (58, 365190), (60, 353017), (70, 302586), (74, 286230), (84, 252155), (87, 243460), (94, 225330), (105, 201724), (111, 190820), (116, 182595), (140, 151293), (141, 150220), (145, 146076), (148, 143115), (174, 121730), (185, 114492), (188, 112665), (203, 104340), (210, 100862), (222, 95410), (235, 90132), (259, 81780), (282, 75110), (290, 73038), (329, 64380), (348, 60865), (370, 57246), (406, 52170), (420, 50431), (435, 48692), (444, 47705), (470, 45066), (518, 40890), (555, 38164), (564, 37555), (580, 36519), (609, 34780), (658, 32190), (705, 30044), (740, 28623), (777, 27260), (812, 26085), (870, 24346), (940, 22533), (987, 21460), (1015, 20868), (1036, 20445), (1073, 19740), (1110, 19082), (1218, 17390), (1295, 16356), (1316, 16095), (1363, 15540), (1410, 15022), (1554, 13630), (1645, 12876), (1739, 12180), (1740, 12173), (1974, 10730), (2030, 10434), (2146, 9870), (2220, 9541), (2436, 8695), (2590, 8178), (2726, 7770), (2820, 7511), (3045, 6956), (3108, 6815), (3219, 6580), (3290, 6438), (3478, 6090), (3885, 5452), (3948, 5365), (4060, 5217), (4089, 5180), (4292, 4935)]