21121925

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{863}}^1$

素因数の和:973

約数の個数: 24

約数和(自身を含む): 28926720

約数和(自身を除く): 7804795

約数列:

[1, 5, 11, 25, 55, 89, 275, 445, 863, 979, 2225, 4315, 4895, 9493, 21575, 24475, 47465, 76807, 237325, 384035, 844877, 1920175, 4224385, 21121925]

約数ペア:

[(1, 21121925), (5, 4224385), (11, 1920175), (25, 844877), (55, 384035), (89, 237325), (275, 76807), (445, 47465), (863, 24475), (979, 21575), (2225, 9493), (4315, 4895)]