21028640

素因数分解:

$2^5\times 5^1\times {\mathrm{167}}^1\times {\mathrm{787}}^1$

素因数の和:969

約数の個数: 48

約数和(自身を含む): 50041152

約数和(自身を除く): 29012512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 167, 334, 668, 787, 835, 1336, 1574, 1670, 2672, 3148, 3340, 3935, 5344, 6296, 6680, 7870, 12592, 13360, 15740, 25184, 26720, 31480, 62960, 125920, 131429, 262858, 525716, 657145, 1051432, 1314290, 2102864, 2628580, 4205728, 5257160, 10514320, 21028640]

約数ペア:

[(1, 21028640), (2, 10514320), (4, 5257160), (5, 4205728), (8, 2628580), (10, 2102864), (16, 1314290), (20, 1051432), (32, 657145), (40, 525716), (80, 262858), (160, 131429), (167, 125920), (334, 62960), (668, 31480), (787, 26720), (835, 25184), (1336, 15740), (1574, 13360), (1670, 12592), (2672, 7870), (3148, 6680), (3340, 6296), (3935, 5344)]