21107720

素因数分解:

$2^3\times 5^1\times {\mathrm{293}}^1\times {\mathrm{1801}}^1$

素因数の和:2105

約数の個数: 32

約数和(自身を含む): 47680920

約数和(自身を除く): 26573200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 293, 586, 1172, 1465, 1801, 2344, 2930, 3602, 5860, 7204, 9005, 11720, 14408, 18010, 36020, 72040, 527693, 1055386, 2110772, 2638465, 4221544, 5276930, 10553860, 21107720]

約数ペア:

[(1, 21107720), (2, 10553860), (4, 5276930), (5, 4221544), (8, 2638465), (10, 2110772), (20, 1055386), (40, 527693), (293, 72040), (586, 36020), (1172, 18010), (1465, 14408), (1801, 11720), (2344, 9005), (2930, 7204), (3602, 5860)]