21613215

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:184

約数の個数: 64

約数和(自身を含む): 39997440

約数和(自身を除く): 18384225

約数列:

[1, 3, 5, 13, 15, 23, 39, 61, 65, 69, 79, 115, 183, 195, 237, 299, 305, 345, 395, 793, 897, 915, 1027, 1185, 1403, 1495, 1817, 2379, 3081, 3965, 4209, 4485, 4819, 5135, 5451, 7015, 9085, 11895, 14457, 15405, 18239, 21045, 23621, 24095, 27255, 54717, 62647, 70863, 72285, 91195, 110837, 118105, 187941, 273585, 313235, 332511, 354315, 554185, 939705, 1440881, 1662555, 4322643, 7204405, 21613215]

約数ペア:

[(1, 21613215), (3, 7204405), (5, 4322643), (13, 1662555), (15, 1440881), (23, 939705), (39, 554185), (61, 354315), (65, 332511), (69, 313235), (79, 273585), (115, 187941), (183, 118105), (195, 110837), (237, 91195), (299, 72285), (305, 70863), (345, 62647), (395, 54717), (793, 27255), (897, 24095), (915, 23621), (1027, 21045), (1185, 18239), (1403, 15405), (1495, 14457), (1817, 11895), (2379, 9085), (3081, 7015), (3965, 5451), (4209, 5135), (4485, 4819)]