21388775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1217}}^1$

素因数の和:1283

約数の個数: 24

約数和(自身を含む): 28696080

約数和(自身を除く): 7307305

約数列:

[1, 5, 19, 25, 37, 95, 185, 475, 703, 925, 1217, 3515, 6085, 17575, 23123, 30425, 45029, 115615, 225145, 578075, 855551, 1125725, 4277755, 21388775]

約数ペア:

[(1, 21388775), (5, 4277755), (19, 1125725), (25, 855551), (37, 578075), (95, 225145), (185, 115615), (475, 45029), (703, 30425), (925, 23123), (1217, 17575), (3515, 6085)]