40389993

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{20681}}^1$

素因数の和:20725

約数の個数: 24

約数和(自身を含む): 68829696

約数和(自身を除く): 28439703

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 20681, 62043, 144767, 186129, 434301, 641111, 1302903, 1923333, 4487777, 5769999, 13463331, 40389993]

約数ペア:

[(1, 40389993), (3, 13463331), (7, 5769999), (9, 4487777), (21, 1923333), (31, 1302903), (63, 641111), (93, 434301), (217, 186129), (279, 144767), (651, 62043), (1953, 20681)]