21405112

素因数分解:

$2^3\times {\mathrm{821}}^1\times {\mathrm{3259}}^1$

素因数の和:4086

約数の個数: 16

約数和(自身を含む): 40195800

約数和(自身を除く): 18790688

約数列:

[1, 2, 4, 8, 821, 1642, 3259, 3284, 6518, 6568, 13036, 26072, 2675639, 5351278, 10702556, 21405112]

約数ペア:

[(1, 21405112), (2, 10702556), (4, 5351278), (8, 2675639), (821, 26072), (1642, 13036), (3259, 6568), (3284, 6518)]