21301809

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1\times {\mathrm{307}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 28902720

約数和(自身を除く): 7600911

約数列:

[1, 3, 101, 229, 303, 307, 687, 921, 23129, 31007, 69387, 70303, 93021, 210909, 7100603, 21301809]

約数ペア:

[(1, 21301809), (3, 7100603), (101, 210909), (229, 93021), (303, 70303), (307, 69387), (687, 31007), (921, 23129)]