18720805

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:189

約数の個数: 32

約数和(自身を含む): 24675840

約数和(自身を除く): 5955035

約数列:

[1, 5, 29, 41, 47, 67, 145, 205, 235, 335, 1189, 1363, 1927, 1943, 2747, 3149, 5945, 6815, 9635, 9715, 13735, 15745, 55883, 79663, 91321, 129109, 279415, 398315, 456605, 645545, 3744161, 18720805]

約数ペア:

[(1, 18720805), (5, 3744161), (29, 645545), (41, 456605), (47, 398315), (67, 279415), (145, 129109), (205, 91321), (235, 79663), (335, 55883), (1189, 15745), (1363, 13735), (1927, 9715), (1943, 9635), (2747, 6815), (3149, 5945)]