21172810

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{457}}^1$

素因数の和:618

約数の個数: 32

約数和(自身を含む): 39472272

約数和(自身を除く): 18299462

約数列:

[1, 2, 5, 10, 41, 82, 113, 205, 226, 410, 457, 565, 914, 1130, 2285, 4570, 4633, 9266, 18737, 23165, 37474, 46330, 51641, 93685, 103282, 187370, 258205, 516410, 2117281, 4234562, 10586405, 21172810]

約数ペア:

[(1, 21172810), (2, 10586405), (5, 4234562), (10, 2117281), (41, 516410), (82, 258205), (113, 187370), (205, 103282), (226, 93685), (410, 51641), (457, 46330), (565, 37474), (914, 23165), (1130, 18737), (2285, 9266), (4570, 4633)]