20205040

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 29791760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 79, 80, 92, 115, 139, 158, 184, 230, 278, 316, 368, 395, 460, 556, 632, 695, 790, 920, 1112, 1264, 1390, 1580, 1817, 1840, 2224, 2780, 3160, 3197, 3634, 5560, 6320, 6394, 7268, 9085, 10981, 11120, 12788, 14536, 15985, 18170, 21962, 25576, 29072, 31970, 36340, 43924, 51152, 54905, 63940, 72680, 87848, 109810, 127880, 145360, 175696, 219620, 252563, 255760, 439240, 505126, 878480, 1010252, 1262815, 2020504, 2525630, 4041008, 5051260, 10102520, 20205040]

約数ペア:

[(1, 20205040), (2, 10102520), (4, 5051260), (5, 4041008), (8, 2525630), (10, 2020504), (16, 1262815), (20, 1010252), (23, 878480), (40, 505126), (46, 439240), (79, 255760), (80, 252563), (92, 219620), (115, 175696), (139, 145360), (158, 127880), (184, 109810), (230, 87848), (278, 72680), (316, 63940), (368, 54905), (395, 51152), (460, 43924), (556, 36340), (632, 31970), (695, 29072), (790, 25576), (920, 21962), (1112, 18170), (1264, 15985), (1390, 14536), (1580, 12788), (1817, 11120), (1840, 10981), (2224, 9085), (2780, 7268), (3160, 6394), (3197, 6320), (3634, 5560)]