21720250

素因数分解:

$2^1\times 5^3\times {\mathrm{283}}^1\times {\mathrm{307}}^1$

素因数の和:607

約数の個数: 32

約数和(自身を含む): 40936896

約数和(自身を除く): 19216646

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 283, 307, 566, 614, 1415, 1535, 2830, 3070, 7075, 7675, 14150, 15350, 35375, 38375, 70750, 76750, 86881, 173762, 434405, 868810, 2172025, 4344050, 10860125, 21720250]

約数ペア:

[(1, 21720250), (2, 10860125), (5, 4344050), (10, 2172025), (25, 868810), (50, 434405), (125, 173762), (250, 86881), (283, 76750), (307, 70750), (566, 38375), (614, 35375), (1415, 15350), (1535, 14150), (2830, 7675), (3070, 7075)]