21506725

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{331}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 28158912

約数和(自身を除く): 6652187

約数列:

[1, 5, 23, 25, 113, 115, 331, 565, 575, 1655, 2599, 2825, 7613, 8275, 12995, 37403, 38065, 64975, 187015, 190325, 860269, 935075, 4301345, 21506725]

約数ペア:

[(1, 21506725), (5, 4301345), (23, 935075), (25, 860269), (113, 190325), (115, 187015), (331, 64975), (565, 38065), (575, 37403), (1655, 12995), (2599, 8275), (2825, 7613)]