21232040

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6719}}^1$

素因数の和:6809

約数の個数: 32

約数和(自身を含む): 48384000

約数和(自身を除く): 27151960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6719, 13438, 26876, 33595, 53752, 67190, 134380, 268760, 530801, 1061602, 2123204, 2654005, 4246408, 5308010, 10616020, 21232040]

約数ペア:

[(1, 21232040), (2, 10616020), (4, 5308010), (5, 4246408), (8, 2654005), (10, 2123204), (20, 1061602), (40, 530801), (79, 268760), (158, 134380), (316, 67190), (395, 53752), (632, 33595), (790, 26876), (1580, 13438), (3160, 6719)]