208545880

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{10007}}^1$

素因数の和:10539

約数の個数: 32

約数和(自身を含む): 470175840

約数和(自身を除く): 261629960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1042, 2084, 2605, 4168, 5210, 10007, 10420, 20014, 20840, 40028, 50035, 80056, 100070, 200140, 400280, 5213647, 10427294, 20854588, 26068235, 41709176, 52136470, 104272940, 208545880]

約数ペア:

[(1, 208545880), (2, 104272940), (4, 52136470), (5, 41709176), (8, 26068235), (10, 20854588), (20, 10427294), (40, 5213647), (521, 400280), (1042, 200140), (2084, 100070), (2605, 80056), (4168, 50035), (5210, 40028), (10007, 20840), (10420, 20014)]