21405016

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{257}}^1\times {\mathrm{359}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 41796000

約数和(自身を除く): 20390984

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 257, 359, 514, 718, 1028, 1436, 2056, 2872, 7453, 10411, 14906, 20822, 29812, 41644, 59624, 83288, 92263, 184526, 369052, 738104, 2675627, 5351254, 10702508, 21405016]

約数ペア:

[(1, 21405016), (2, 10702508), (4, 5351254), (8, 2675627), (29, 738104), (58, 369052), (116, 184526), (232, 92263), (257, 83288), (359, 59624), (514, 41644), (718, 29812), (1028, 20822), (1436, 14906), (2056, 10411), (2872, 7453)]