20858864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{347}}^1$

素因数の和:402

約数の個数: 60

約数和(自身を含む): 46366824

約数和(自身を除く): 25507960

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 208, 221, 272, 289, 347, 442, 578, 694, 884, 1156, 1388, 1768, 2312, 2776, 3536, 3757, 4511, 4624, 5552, 5899, 7514, 9022, 11798, 15028, 18044, 23596, 30056, 36088, 47192, 60112, 72176, 76687, 94384, 100283, 153374, 200566, 306748, 401132, 613496, 802264, 1226992, 1303679, 1604528, 2607358, 5214716, 10429432, 20858864]

約数ペア:

[(1, 20858864), (2, 10429432), (4, 5214716), (8, 2607358), (13, 1604528), (16, 1303679), (17, 1226992), (26, 802264), (34, 613496), (52, 401132), (68, 306748), (104, 200566), (136, 153374), (208, 100283), (221, 94384), (272, 76687), (289, 72176), (347, 60112), (442, 47192), (578, 36088), (694, 30056), (884, 23596), (1156, 18044), (1388, 15028), (1768, 11798), (2312, 9022), (2776, 7514), (3536, 5899), (3757, 5552), (4511, 4624)]