21361420

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6803}}^1$

素因数の和:6969

約数の個数: 24

約数和(自身を含む): 45151344

約数和(自身を除く): 23789924

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6803, 13606, 27212, 34015, 68030, 136060, 1068071, 2136142, 4272284, 5340355, 10680710, 21361420]

約数ペア:

[(1, 21361420), (2, 10680710), (4, 5340355), (5, 4272284), (10, 2136142), (20, 1068071), (157, 136060), (314, 68030), (628, 34015), (785, 27212), (1570, 13606), (3140, 6803)]