18881815

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 24535440

約数和(自身を除く): 5653625

約数列:

[1, 5, 17, 73, 85, 179, 289, 365, 895, 1241, 1445, 3043, 6205, 13067, 15215, 21097, 51731, 65335, 105485, 222139, 258655, 1110695, 3776363, 18881815]

約数ペア:

[(1, 18881815), (5, 3776363), (17, 1110695), (73, 258655), (85, 222139), (179, 105485), (289, 65335), (365, 51731), (895, 21097), (1241, 15215), (1445, 13067), (3043, 6205)]