28890520

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1381}}^1$

素因数の和:1915

約数の個数: 32

約数和(自身を含む): 65175120

約数和(自身を除く): 36284600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 1381, 2092, 2615, 2762, 4184, 5230, 5524, 6905, 10460, 11048, 13810, 20920, 27620, 55240, 722263, 1444526, 2889052, 3611315, 5778104, 7222630, 14445260, 28890520]

約数ペア:

[(1, 28890520), (2, 14445260), (4, 7222630), (5, 5778104), (8, 3611315), (10, 2889052), (20, 1444526), (40, 722263), (523, 55240), (1046, 27620), (1381, 20920), (2092, 13810), (2615, 11048), (2762, 10460), (4184, 6905), (5230, 5524)]