16721525

素因数分解:

$5^2\times {\mathrm{67}}^2\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 18

約数和(自身を含む): 21190050

約数和(自身を除く): 4468525

約数列:

[1, 5, 25, 67, 149, 335, 745, 1675, 3725, 4489, 9983, 22445, 49915, 112225, 249575, 668861, 3344305, 16721525]

約数ペア:

[(1, 16721525), (5, 3344305), (25, 668861), (67, 249575), (149, 112225), (335, 49915), (745, 22445), (1675, 9983), (3725, 4489)]