20455880

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9649}}^1$

素因数の和:9713

約数の個数: 32

約数和(自身を含む): 46899000

約数和(自身を除く): 26443120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9649, 19298, 38596, 48245, 77192, 96490, 192980, 385960, 511397, 1022794, 2045588, 2556985, 4091176, 5113970, 10227940, 20455880]

約数ペア:

[(1, 20455880), (2, 10227940), (4, 5113970), (5, 4091176), (8, 2556985), (10, 2045588), (20, 1022794), (40, 511397), (53, 385960), (106, 192980), (212, 96490), (265, 77192), (424, 48245), (530, 38596), (1060, 19298), (2120, 9649)]