20345020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{577}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 44862048

約数和(自身を除く): 24517028

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 577, 820, 860, 1154, 1763, 2308, 2885, 3526, 5770, 7052, 8815, 11540, 17630, 23657, 24811, 35260, 47314, 49622, 94628, 99244, 118285, 124055, 236570, 248110, 473140, 496220, 1017251, 2034502, 4069004, 5086255, 10172510, 20345020]

約数ペア:

[(1, 20345020), (2, 10172510), (4, 5086255), (5, 4069004), (10, 2034502), (20, 1017251), (41, 496220), (43, 473140), (82, 248110), (86, 236570), (164, 124055), (172, 118285), (205, 99244), (215, 94628), (410, 49622), (430, 47314), (577, 35260), (820, 24811), (860, 23657), (1154, 17630), (1763, 11540), (2308, 8815), (2885, 7052), (3526, 5770)]