21697340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154981}}^1$

素因数の和:154997

約数の個数: 24

約数和(自身を含む): 52073952

約数和(自身を除く): 30376612

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154981, 309962, 619924, 774905, 1084867, 1549810, 2169734, 3099620, 4339468, 5424335, 10848670, 21697340]

約数ペア:

[(1, 21697340), (2, 10848670), (4, 5424335), (5, 4339468), (7, 3099620), (10, 2169734), (14, 1549810), (20, 1084867), (28, 774905), (35, 619924), (70, 309962), (140, 154981)]