18661136

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1229}}^1$

素因数の和:1323

約数の個数: 40

約数和(自身を含む): 39502680

約数和(自身を除く): 20841544

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 146, 208, 292, 584, 949, 1168, 1229, 1898, 2458, 3796, 4916, 7592, 9832, 15184, 15977, 19664, 31954, 63908, 89717, 127816, 179434, 255632, 358868, 717736, 1166321, 1435472, 2332642, 4665284, 9330568, 18661136]

約数ペア:

[(1, 18661136), (2, 9330568), (4, 4665284), (8, 2332642), (13, 1435472), (16, 1166321), (26, 717736), (52, 358868), (73, 255632), (104, 179434), (146, 127816), (208, 89717), (292, 63908), (584, 31954), (949, 19664), (1168, 15977), (1229, 15184), (1898, 9832), (2458, 7592), (3796, 4916)]