21315880

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{3191}}^1$

素因数の和:3369

約数の個数: 32

約数和(自身を含む): 48263040

約数和(自身を除く): 26947160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 334, 668, 835, 1336, 1670, 3191, 3340, 6382, 6680, 12764, 15955, 25528, 31910, 63820, 127640, 532897, 1065794, 2131588, 2664485, 4263176, 5328970, 10657940, 21315880]

約数ペア:

[(1, 21315880), (2, 10657940), (4, 5328970), (5, 4263176), (8, 2664485), (10, 2131588), (20, 1065794), (40, 532897), (167, 127640), (334, 63820), (668, 31910), (835, 25528), (1336, 15955), (1670, 12764), (3191, 6680), (3340, 6382)]