21159975

素因数分解:

$3^1\times 5^2\times {\mathrm{307}}^1\times {\mathrm{919}}^1$

素因数の和:1239

約数の個数: 24

約数和(自身を含む): 35136640

約数和(自身を除く): 13976665

約数列:

[1, 3, 5, 15, 25, 75, 307, 919, 921, 1535, 2757, 4595, 4605, 7675, 13785, 22975, 23025, 68925, 282133, 846399, 1410665, 4231995, 7053325, 21159975]

約数ペア:

[(1, 21159975), (3, 7053325), (5, 4231995), (15, 1410665), (25, 846399), (75, 282133), (307, 68925), (919, 23025), (921, 22975), (1535, 13785), (2757, 7675), (4595, 4605)]