21491223

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 34433280

約数和(自身を除く): 12942057

約数列:

[1, 3, 13, 19, 23, 39, 57, 69, 97, 169, 247, 291, 299, 437, 507, 741, 897, 1261, 1311, 1843, 2231, 3211, 3783, 3887, 5529, 5681, 6693, 9633, 11661, 16393, 17043, 23959, 29003, 42389, 49179, 71877, 73853, 87009, 127167, 221559, 311467, 377039, 551057, 934401, 1131117, 1653171, 7163741, 21491223]

約数ペア:

[(1, 21491223), (3, 7163741), (13, 1653171), (19, 1131117), (23, 934401), (39, 551057), (57, 377039), (69, 311467), (97, 221559), (169, 127167), (247, 87009), (291, 73853), (299, 71877), (437, 49179), (507, 42389), (741, 29003), (897, 23959), (1261, 17043), (1311, 16393), (1843, 11661), (2231, 9633), (3211, 6693), (3783, 5681), (3887, 5529)]