21012927

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{5231}}^1$

素因数の和:5350

約数の個数: 16

約数和(自身を含む): 30471168

約数和(自身を除く): 9458241

約数列:

[1, 3, 13, 39, 103, 309, 1339, 4017, 5231, 15693, 68003, 204009, 538793, 1616379, 7004309, 21012927]

約数ペア:

[(1, 21012927), (3, 7004309), (13, 1616379), (39, 538793), (103, 204009), (309, 68003), (1339, 15693), (4017, 5231)]