257788455

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{2621}}^1$

素因数の和:2791

約数の個数: 32

約数和(自身を含む): 422876160

約数和(自身を除く): 165087705

約数列:

[1, 3, 5, 15, 79, 83, 237, 249, 395, 415, 1185, 1245, 2621, 6557, 7863, 13105, 19671, 32785, 39315, 98355, 207059, 217543, 621177, 652629, 1035295, 1087715, 3105885, 3263145, 17185897, 51557691, 85929485, 257788455]

約数ペア:

[(1, 257788455), (3, 85929485), (5, 51557691), (15, 17185897), (79, 3263145), (83, 3105885), (237, 1087715), (249, 1035295), (395, 652629), (415, 621177), (1185, 217543), (1245, 207059), (2621, 98355), (6557, 39315), (7863, 32785), (13105, 19671)]