20852780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{577}}^1$

素因数の和:738

約数の個数: 48

約数和(自身を含む): 47580960

約数和(自身を除く): 26728180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 556, 577, 695, 1154, 1390, 1807, 2308, 2780, 2885, 3614, 5770, 7228, 7501, 9035, 11540, 15002, 18070, 30004, 36140, 37505, 75010, 80203, 150020, 160406, 320812, 401015, 802030, 1042639, 1604060, 2085278, 4170556, 5213195, 10426390, 20852780]

約数ペア:

[(1, 20852780), (2, 10426390), (4, 5213195), (5, 4170556), (10, 2085278), (13, 1604060), (20, 1042639), (26, 802030), (52, 401015), (65, 320812), (130, 160406), (139, 150020), (260, 80203), (278, 75010), (556, 37505), (577, 36140), (695, 30004), (1154, 18070), (1390, 15002), (1807, 11540), (2308, 9035), (2780, 7501), (2885, 7228), (3614, 5770)]