18916144

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{457}}^1$

素因数の和:677

約数の個数: 40

約数和(自身を含む): 39754400

約数和(自身を除く): 20838256

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 199, 208, 398, 457, 796, 914, 1592, 1828, 2587, 3184, 3656, 5174, 5941, 7312, 10348, 11882, 20696, 23764, 41392, 47528, 90943, 95056, 181886, 363772, 727544, 1182259, 1455088, 2364518, 4729036, 9458072, 18916144]

約数ペア:

[(1, 18916144), (2, 9458072), (4, 4729036), (8, 2364518), (13, 1455088), (16, 1182259), (26, 727544), (52, 363772), (104, 181886), (199, 95056), (208, 90943), (398, 47528), (457, 41392), (796, 23764), (914, 20696), (1592, 11882), (1828, 10348), (2587, 7312), (3184, 5941), (3656, 5174)]