20548840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{919}}^1$

素因数の和:986

約数の個数: 64

約数和(自身を含む): 51004800

約数和(自身を除く): 30455960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 919, 1118, 1720, 1838, 2236, 2795, 3676, 4472, 4595, 5590, 7352, 9190, 11180, 11947, 18380, 22360, 23894, 36760, 39517, 47788, 59735, 79034, 95576, 119470, 158068, 197585, 238940, 316136, 395170, 477880, 513721, 790340, 1027442, 1580680, 2054884, 2568605, 4109768, 5137210, 10274420, 20548840]

約数ペア:

[(1, 20548840), (2, 10274420), (4, 5137210), (5, 4109768), (8, 2568605), (10, 2054884), (13, 1580680), (20, 1027442), (26, 790340), (40, 513721), (43, 477880), (52, 395170), (65, 316136), (86, 238940), (104, 197585), (130, 158068), (172, 119470), (215, 95576), (260, 79034), (344, 59735), (430, 47788), (520, 39517), (559, 36760), (860, 23894), (919, 22360), (1118, 18380), (1720, 11947), (1838, 11180), (2236, 9190), (2795, 7352), (3676, 5590), (4472, 4595)]