21601840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20771}}^1$

素因数の和:20797

約数の個数: 40

約数和(自身を含む): 54090288

約数和(自身を除く): 32488448

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20771, 41542, 83084, 103855, 166168, 207710, 270023, 332336, 415420, 540046, 830840, 1080092, 1350115, 1661680, 2160184, 2700230, 4320368, 5400460, 10800920, 21601840]

約数ペア:

[(1, 21601840), (2, 10800920), (4, 5400460), (5, 4320368), (8, 2700230), (10, 2160184), (13, 1661680), (16, 1350115), (20, 1080092), (26, 830840), (40, 540046), (52, 415420), (65, 332336), (80, 270023), (104, 207710), (130, 166168), (208, 103855), (260, 83084), (520, 41542), (1040, 20771)]