21791195

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 29652480

約数和(自身を除く): 7861285

約数列:

[1, 5, 17, 19, 85, 95, 103, 131, 323, 515, 655, 1615, 1751, 1957, 2227, 2489, 8755, 9785, 11135, 12445, 13493, 33269, 42313, 67465, 166345, 211565, 229381, 256367, 1146905, 1281835, 4358239, 21791195]

約数ペア:

[(1, 21791195), (5, 4358239), (17, 1281835), (19, 1146905), (85, 256367), (95, 229381), (103, 211565), (131, 166345), (323, 67465), (515, 42313), (655, 33269), (1615, 13493), (1751, 12445), (1957, 11135), (2227, 9785), (2489, 8755)]