21288968

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{617}}^1$

素因数の和:869

約数の個数: 32

約数和(自身を含む): 42271200

約数和(自身を除く): 20982232

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 227, 454, 617, 908, 1234, 1816, 2468, 4313, 4936, 8626, 11723, 17252, 23446, 34504, 46892, 93784, 140059, 280118, 560236, 1120472, 2661121, 5322242, 10644484, 21288968]

約数ペア:

[(1, 21288968), (2, 10644484), (4, 5322242), (8, 2661121), (19, 1120472), (38, 560236), (76, 280118), (152, 140059), (227, 93784), (454, 46892), (617, 34504), (908, 23446), (1234, 17252), (1816, 11723), (2468, 8626), (4313, 4936)]