21689499

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{1321}}^1$

素因数の和:1758

約数の個数: 16

約数和(自身を含む): 31241504

約数和(自身を除く): 9552005

約数列:

[1, 3, 13, 39, 421, 1263, 1321, 3963, 5473, 16419, 17173, 51519, 556141, 1668423, 7229833, 21689499]

約数ペア:

[(1, 21689499), (3, 7229833), (13, 1668423), (39, 556141), (421, 51519), (1263, 17173), (1321, 16419), (3963, 5473)]