21364980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1$

素因数の和:95

約数の個数: 216

約数和(自身を含む): 77105952

約数和(自身を除く): 55740972

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 43, 49, 52, 60, 65, 70, 78, 84, 86, 91, 98, 105, 129, 130, 140, 147, 156, 169, 172, 182, 195, 196, 210, 215, 245, 258, 260, 273, 294, 301, 338, 364, 390, 420, 430, 455, 490, 507, 516, 546, 559, 588, 602, 637, 645, 676, 735, 780, 845, 860, 903, 910, 980, 1014, 1092, 1118, 1183, 1204, 1274, 1290, 1365, 1470, 1505, 1677, 1690, 1806, 1820, 1911, 2028, 2107, 2236, 2366, 2535, 2548, 2580, 2730, 2795, 2940, 3010, 3185, 3354, 3380, 3549, 3612, 3822, 3913, 4214, 4515, 4732, 5070, 5460, 5590, 5915, 6020, 6321, 6370, 6708, 7098, 7267, 7644, 7826, 8281, 8385, 8428, 9030, 9555, 10140, 10535, 11180, 11739, 11830, 12642, 12740, 14196, 14534, 15652, 16562, 16770, 17745, 18060, 19110, 19565, 21070, 21801, 23478, 23660, 24843, 25284, 27391, 29068, 31605, 33124, 33540, 35490, 36335, 38220, 39130, 41405, 42140, 43602, 46956, 49686, 50869, 54782, 58695, 63210, 70980, 72670, 78260, 82173, 82810, 87204, 99372, 101738, 109005, 109564, 117390, 124215, 126420, 136955, 145340, 152607, 164346, 165620, 203476, 218010, 234780, 248430, 254345, 273910, 305214, 328692, 356083, 410865, 436020, 496860, 508690, 547820, 610428, 712166, 763035, 821730, 1017380, 1068249, 1424332, 1526070, 1643460, 1780415, 2136498, 3052140, 3560830, 4272996, 5341245, 7121660, 10682490, 21364980]

約数ペア:

[(1, 21364980), (2, 10682490), (3, 7121660), (4, 5341245), (5, 4272996), (6, 3560830), (7, 3052140), (10, 2136498), (12, 1780415), (13, 1643460), (14, 1526070), (15, 1424332), (20, 1068249), (21, 1017380), (26, 821730), (28, 763035), (30, 712166), (35, 610428), (39, 547820), (42, 508690), (43, 496860), (49, 436020), (52, 410865), (60, 356083), (65, 328692), (70, 305214), (78, 273910), (84, 254345), (86, 248430), (91, 234780), (98, 218010), (105, 203476), (129, 165620), (130, 164346), (140, 152607), (147, 145340), (156, 136955), (169, 126420), (172, 124215), (182, 117390), (195, 109564), (196, 109005), (210, 101738), (215, 99372), (245, 87204), (258, 82810), (260, 82173), (273, 78260), (294, 72670), (301, 70980), (338, 63210), (364, 58695), (390, 54782), (420, 50869), (430, 49686), (455, 46956), (490, 43602), (507, 42140), (516, 41405), (546, 39130), (559, 38220), (588, 36335), (602, 35490), (637, 33540), (645, 33124), (676, 31605), (735, 29068), (780, 27391), (845, 25284), (860, 24843), (903, 23660), (910, 23478), (980, 21801), (1014, 21070), (1092, 19565), (1118, 19110), (1183, 18060), (1204, 17745), (1274, 16770), (1290, 16562), (1365, 15652), (1470, 14534), (1505, 14196), (1677, 12740), (1690, 12642), (1806, 11830), (1820, 11739), (1911, 11180), (2028, 10535), (2107, 10140), (2236, 9555), (2366, 9030), (2535, 8428), (2548, 8385), (2580, 8281), (2730, 7826), (2795, 7644), (2940, 7267), (3010, 7098), (3185, 6708), (3354, 6370), (3380, 6321), (3549, 6020), (3612, 5915), (3822, 5590), (3913, 5460), (4214, 5070), (4515, 4732)]