21712780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26479}}^1$

素因数の和:26529

約数の個数: 24

約数和(自身を含む): 46710720

約数和(自身を除く): 24997940

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26479, 52958, 105916, 132395, 264790, 529580, 1085639, 2171278, 4342556, 5428195, 10856390, 21712780]

約数ペア:

[(1, 21712780), (2, 10856390), (4, 5428195), (5, 4342556), (10, 2171278), (20, 1085639), (41, 529580), (82, 264790), (164, 132395), (205, 105916), (410, 52958), (820, 26479)]