18891990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1$

素因数の和:334

約数の個数: 96

約数和(自身を含む): 53909856

約数和(自身を除く): 35017866

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 67, 78, 90, 117, 130, 134, 195, 201, 234, 241, 335, 390, 402, 482, 585, 603, 670, 723, 871, 1005, 1170, 1205, 1206, 1446, 1742, 2010, 2169, 2410, 2613, 3015, 3133, 3615, 4338, 4355, 5226, 6030, 6266, 7230, 7839, 8710, 9399, 10845, 13065, 15665, 15678, 16147, 18798, 21690, 26130, 28197, 31330, 32294, 39195, 46995, 48441, 56394, 78390, 80735, 93990, 96882, 140985, 145323, 161470, 209911, 242205, 281970, 290646, 419822, 484410, 629733, 726615, 1049555, 1259466, 1453230, 1889199, 2099110, 3148665, 3778398, 6297330, 9445995, 18891990]

約数ペア:

[(1, 18891990), (2, 9445995), (3, 6297330), (5, 3778398), (6, 3148665), (9, 2099110), (10, 1889199), (13, 1453230), (15, 1259466), (18, 1049555), (26, 726615), (30, 629733), (39, 484410), (45, 419822), (65, 290646), (67, 281970), (78, 242205), (90, 209911), (117, 161470), (130, 145323), (134, 140985), (195, 96882), (201, 93990), (234, 80735), (241, 78390), (335, 56394), (390, 48441), (402, 46995), (482, 39195), (585, 32294), (603, 31330), (670, 28197), (723, 26130), (871, 21690), (1005, 18798), (1170, 16147), (1205, 15678), (1206, 15665), (1446, 13065), (1742, 10845), (2010, 9399), (2169, 8710), (2410, 7839), (2613, 7230), (3015, 6266), (3133, 6030), (3615, 5226), (4338, 4355)]