21047845

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{277}}^1$

素因数の和:469

約数の個数: 32

約数和(自身を含む): 31385088

約数和(自身を除く): 10337243

約数列:

[1, 5, 7, 13, 35, 65, 91, 167, 277, 455, 835, 1169, 1385, 1939, 2171, 3601, 5845, 9695, 10855, 15197, 18005, 25207, 46259, 75985, 126035, 231295, 323813, 601367, 1619065, 3006835, 4209569, 21047845]

約数ペア:

[(1, 21047845), (5, 4209569), (7, 3006835), (13, 1619065), (35, 601367), (65, 323813), (91, 231295), (167, 126035), (277, 75985), (455, 46259), (835, 25207), (1169, 18005), (1385, 15197), (1939, 10855), (2171, 9695), (3601, 5845)]