20989225

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{211}}^1$

素因数の和:417

約数の個数: 24

約数和(自身を含む): 27444672

約数和(自身を除く): 6455447

約数列:

[1, 5, 23, 25, 115, 173, 211, 575, 865, 1055, 3979, 4325, 4853, 5275, 19895, 24265, 36503, 99475, 121325, 182515, 839569, 912575, 4197845, 20989225]

約数ペア:

[(1, 20989225), (5, 4197845), (23, 912575), (25, 839569), (115, 182515), (173, 121325), (211, 99475), (575, 36503), (865, 24265), (1055, 19895), (3979, 5275), (4325, 4853)]