19902897

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5179}}^1$

素因数の和:5253

約数の個数: 24

約数和(自身を含む): 33400640

約数和(自身を除く): 13497743

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5179, 15537, 36253, 46611, 108759, 315919, 326277, 947757, 2211433, 2843271, 6634299, 19902897]

約数ペア:

[(1, 19902897), (3, 6634299), (7, 2843271), (9, 2211433), (21, 947757), (61, 326277), (63, 315919), (183, 108759), (427, 46611), (549, 36253), (1281, 15537), (3843, 5179)]