20258288

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1049}}^1$

素因数の和:1145

約数の個数: 40

約数和(自身を含む): 42184800

約数和(自身を除く): 21926512

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 71, 136, 142, 272, 284, 568, 1049, 1136, 1207, 2098, 2414, 4196, 4828, 8392, 9656, 16784, 17833, 19312, 35666, 71332, 74479, 142664, 148958, 285328, 297916, 595832, 1191664, 1266143, 2532286, 5064572, 10129144, 20258288]

約数ペア:

[(1, 20258288), (2, 10129144), (4, 5064572), (8, 2532286), (16, 1266143), (17, 1191664), (34, 595832), (68, 297916), (71, 285328), (136, 148958), (142, 142664), (272, 74479), (284, 71332), (568, 35666), (1049, 19312), (1136, 17833), (1207, 16784), (2098, 9656), (2414, 8392), (4196, 4828)]