28857140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{110989}}^1$

素因数の和:111011

約数の個数: 24

約数和(自身を含む): 65262120

約数和(自身を除く): 36404980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 110989, 221978, 443956, 554945, 1109890, 1442857, 2219780, 2885714, 5771428, 7214285, 14428570, 28857140]

約数ペア:

[(1, 28857140), (2, 14428570), (4, 7214285), (5, 5771428), (10, 2885714), (13, 2219780), (20, 1442857), (26, 1109890), (52, 554945), (65, 443956), (130, 221978), (260, 110989)]