20215825

素因数分解:

$5^2\times 7^1\times {\mathrm{331}}^1\times {\mathrm{349}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 28817600

約数和(自身を除く): 8601775

約数列:

[1, 5, 7, 25, 35, 175, 331, 349, 1655, 1745, 2317, 2443, 8275, 8725, 11585, 12215, 57925, 61075, 115519, 577595, 808633, 2887975, 4043165, 20215825]

約数ペア:

[(1, 20215825), (5, 4043165), (7, 2887975), (25, 808633), (35, 577595), (175, 115519), (331, 61075), (349, 57925), (1655, 12215), (1745, 11585), (2317, 8725), (2443, 8275)]