21751765

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 31046400

約数和(自身を除く): 9294635

約数列:

[1, 5, 7, 35, 43, 97, 149, 215, 301, 485, 679, 745, 1043, 1505, 3395, 4171, 5215, 6407, 14453, 20855, 29197, 32035, 44849, 72265, 101171, 145985, 224245, 505855, 621479, 3107395, 4350353, 21751765]

約数ペア:

[(1, 21751765), (5, 4350353), (7, 3107395), (35, 621479), (43, 505855), (97, 224245), (149, 145985), (215, 101171), (301, 72265), (485, 44849), (679, 32035), (745, 29197), (1043, 20855), (1505, 14453), (3395, 6407), (4171, 5215)]