81181240

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:190

約数の個数: 128

約数和(自身を含む): 218736000

約数和(自身を除く): 137554760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 61, 70, 97, 98, 122, 140, 194, 196, 244, 245, 280, 305, 343, 388, 392, 427, 485, 488, 490, 610, 679, 686, 776, 854, 970, 980, 1220, 1358, 1372, 1708, 1715, 1940, 1960, 2135, 2440, 2716, 2744, 2989, 3395, 3416, 3430, 3880, 4270, 4753, 5432, 5917, 5978, 6790, 6860, 8540, 9506, 11834, 11956, 13580, 13720, 14945, 17080, 19012, 20923, 23668, 23765, 23912, 27160, 29585, 29890, 33271, 38024, 41419, 41846, 47336, 47530, 59170, 59780, 66542, 82838, 83692, 95060, 104615, 118340, 119560, 133084, 165676, 166355, 167384, 190120, 207095, 209230, 236680, 266168, 289933, 331352, 332710, 414190, 418460, 579866, 665420, 828380, 836920, 1159732, 1330840, 1449665, 1656760, 2029531, 2319464, 2899330, 4059062, 5798660, 8118124, 10147655, 11597320, 16236248, 20295310, 40590620, 81181240]

約数ペア:

[(1, 81181240), (2, 40590620), (4, 20295310), (5, 16236248), (7, 11597320), (8, 10147655), (10, 8118124), (14, 5798660), (20, 4059062), (28, 2899330), (35, 2319464), (40, 2029531), (49, 1656760), (56, 1449665), (61, 1330840), (70, 1159732), (97, 836920), (98, 828380), (122, 665420), (140, 579866), (194, 418460), (196, 414190), (244, 332710), (245, 331352), (280, 289933), (305, 266168), (343, 236680), (388, 209230), (392, 207095), (427, 190120), (485, 167384), (488, 166355), (490, 165676), (610, 133084), (679, 119560), (686, 118340), (776, 104615), (854, 95060), (970, 83692), (980, 82838), (1220, 66542), (1358, 59780), (1372, 59170), (1708, 47530), (1715, 47336), (1940, 41846), (1960, 41419), (2135, 38024), (2440, 33271), (2716, 29890), (2744, 29585), (2989, 27160), (3395, 23912), (3416, 23765), (3430, 23668), (3880, 20923), (4270, 19012), (4753, 17080), (5432, 14945), (5917, 13720), (5978, 13580), (6790, 11956), (6860, 11834), (8540, 9506)]