21290318

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1787}}^1$

素因数の和:1856

約数の個数: 32

約数和(自身を含む): 39135744

約数和(自身を除く): 17845426

約数列:

[1, 2, 7, 14, 23, 37, 46, 74, 161, 259, 322, 518, 851, 1702, 1787, 3574, 5957, 11914, 12509, 25018, 41101, 66119, 82202, 132238, 287707, 462833, 575414, 925666, 1520737, 3041474, 10645159, 21290318]

約数ペア:

[(1, 21290318), (2, 10645159), (7, 3041474), (14, 1520737), (23, 925666), (37, 575414), (46, 462833), (74, 287707), (161, 132238), (259, 82202), (322, 66119), (518, 41101), (851, 25018), (1702, 12509), (1787, 11914), (3574, 5957)]