21638888

素因数分解:

$2^3\times {\mathrm{997}}^1\times {\mathrm{2713}}^1$

素因数の和:3716

約数の個数: 16

約数和(自身を含む): 40628580

約数和(自身を除く): 18989692

約数列:

[1, 2, 4, 8, 997, 1994, 2713, 3988, 5426, 7976, 10852, 21704, 2704861, 5409722, 10819444, 21638888]

約数ペア:

[(1, 21638888), (2, 10819444), (4, 5409722), (8, 2704861), (997, 21704), (1994, 10852), (2713, 7976), (3988, 5426)]