21293705

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 26058240

約数和(自身を除く): 4764535

約数列:

[1, 5, 103, 173, 239, 515, 865, 1195, 17819, 24617, 41347, 89095, 123085, 206735, 4258741, 21293705]

約数ペア:

[(1, 21293705), (5, 4258741), (103, 206735), (173, 123085), (239, 89095), (515, 41347), (865, 24617), (1195, 17819)]