21667745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{2609}}^1$

素因数の和:2776

約数の個数: 16

約数和(自身を含む): 28563840

約数和(自身を除く): 6896095

約数列:

[1, 5, 11, 55, 151, 755, 1661, 2609, 8305, 13045, 28699, 143495, 393959, 1969795, 4333549, 21667745]

約数ペア:

[(1, 21667745), (5, 4333549), (11, 1969795), (55, 393959), (151, 143495), (755, 28699), (1661, 13045), (2609, 8305)]