18990175

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{191}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 24498432

約数和(自身を除く): 5508257

約数列:

[1, 5, 25, 41, 97, 191, 205, 485, 955, 1025, 2425, 3977, 4775, 7831, 18527, 19885, 39155, 92635, 99425, 195775, 463175, 759607, 3798035, 18990175]

約数ペア:

[(1, 18990175), (5, 3798035), (25, 759607), (41, 463175), (97, 195775), (191, 99425), (205, 92635), (485, 39155), (955, 19885), (1025, 18527), (2425, 7831), (3977, 4775)]