88890890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{18793}}^1$

素因数の和:18854

約数の個数: 32

約数和(自身を含む): 178618176

約数和(自身を除く): 89727286

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 110, 215, 430, 473, 946, 2365, 4730, 18793, 37586, 93965, 187930, 206723, 413446, 808099, 1033615, 1616198, 2067230, 4040495, 8080990, 8889089, 17778178, 44445445, 88890890]

約数ペア:

[(1, 88890890), (2, 44445445), (5, 17778178), (10, 8889089), (11, 8080990), (22, 4040495), (43, 2067230), (55, 1616198), (86, 1033615), (110, 808099), (215, 413446), (430, 206723), (473, 187930), (946, 93965), (2365, 37586), (4730, 18793)]