21619820

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6473}}^1$

素因数の和:6649

約数の個数: 24

約数和(自身を含む): 45680544

約数和(自身を除く): 24060724

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 6473, 12946, 25892, 32365, 64730, 129460, 1080991, 2161982, 4323964, 5404955, 10809910, 21619820]

約数ペア:

[(1, 21619820), (2, 10809910), (4, 5404955), (5, 4323964), (10, 2161982), (20, 1080991), (167, 129460), (334, 64730), (668, 32365), (835, 25892), (1670, 12946), (3340, 6473)]