21718540

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4129}}^1$

素因数の和:4401

約数の個数: 24

約数和(自身を含む): 45793440

約数和(自身を除く): 24074900

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4129, 5260, 8258, 16516, 20645, 41290, 82580, 1085927, 2171854, 4343708, 5429635, 10859270, 21718540]

約数ペア:

[(1, 21718540), (2, 10859270), (4, 5429635), (5, 4343708), (10, 2171854), (20, 1085927), (263, 82580), (526, 41290), (1052, 20645), (1315, 16516), (2630, 8258), (4129, 5260)]