18398840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:636

約数の個数: 64

約数和(自身を含む): 44668800

約数和(自身を除く): 26269960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 563, 760, 817, 860, 1126, 1634, 1720, 2252, 2815, 3268, 4085, 4504, 5630, 6536, 8170, 10697, 11260, 16340, 21394, 22520, 24209, 32680, 42788, 48418, 53485, 85576, 96836, 106970, 121045, 193672, 213940, 242090, 427880, 459971, 484180, 919942, 968360, 1839884, 2299855, 3679768, 4599710, 9199420, 18398840]

約数ペア:

[(1, 18398840), (2, 9199420), (4, 4599710), (5, 3679768), (8, 2299855), (10, 1839884), (19, 968360), (20, 919942), (38, 484180), (40, 459971), (43, 427880), (76, 242090), (86, 213940), (95, 193672), (152, 121045), (172, 106970), (190, 96836), (215, 85576), (344, 53485), (380, 48418), (430, 42788), (563, 32680), (760, 24209), (817, 22520), (860, 21394), (1126, 16340), (1634, 11260), (1720, 10697), (2252, 8170), (2815, 6536), (3268, 5630), (4085, 4504)]