21004490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161573}}^1$

素因数の和:161593

約数の個数: 16

約数和(自身を含む): 40716648

約数和(自身を除く): 19712158

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161573, 323146, 807865, 1615730, 2100449, 4200898, 10502245, 21004490]

約数ペア:

[(1, 21004490), (2, 10502245), (5, 4200898), (10, 2100449), (13, 1615730), (26, 807865), (65, 323146), (130, 161573)]