405378981

素因数分解:

$3^2\times 7^1\times {\mathrm{2179}}^1\times {\mathrm{2953}}^1$

素因数の和:5145

約数の個数: 24

約数和(自身を含む): 669730880

約数和(自身を除く): 264351899

約数列:

[1, 3, 7, 9, 21, 63, 2179, 2953, 6537, 8859, 15253, 19611, 20671, 26577, 45759, 62013, 137277, 186039, 6434587, 19303761, 45042109, 57911283, 135126327, 405378981]

約数ペア:

[(1, 405378981), (3, 135126327), (7, 57911283), (9, 45042109), (21, 19303761), (63, 6434587), (2179, 186039), (2953, 137277), (6537, 62013), (8859, 45759), (15253, 26577), (19611, 20671)]