21299915

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^3\times {\mathrm{277}}^1$

素因数の和:328

約数の個数: 32

約数和(自身を含む): 31758720

約数和(自身を除く): 10458805

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 277, 455, 845, 1183, 1385, 1939, 2197, 3601, 5915, 9695, 10985, 15379, 18005, 25207, 46813, 76895, 126035, 234065, 327691, 608569, 1638455, 3042845, 4259983, 21299915]

約数ペア:

[(1, 21299915), (5, 4259983), (7, 3042845), (13, 1638455), (35, 608569), (65, 327691), (91, 234065), (169, 126035), (277, 76895), (455, 46813), (845, 25207), (1183, 18005), (1385, 15379), (1939, 10985), (2197, 9695), (3601, 5915)]