20739957

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 32621568

約数和(自身を除く): 11881611

約数列:

[1, 3, 7, 21, 73, 83, 163, 219, 249, 489, 511, 581, 1141, 1533, 1743, 3423, 6059, 11899, 13529, 18177, 35697, 40587, 42413, 83293, 94703, 127239, 249879, 284109, 987617, 2962851, 6913319, 20739957]

約数ペア:

[(1, 20739957), (3, 6913319), (7, 2962851), (21, 987617), (73, 284109), (83, 249879), (163, 127239), (219, 94703), (249, 83293), (489, 42413), (511, 40587), (581, 35697), (1141, 18177), (1533, 13529), (1743, 11899), (3423, 6059)]