81887780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{314953}}^1$

素因数の和:314975

約数の個数: 24

約数和(自身を含む): 185192952

約数和(自身を除く): 103305172

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 314953, 629906, 1259812, 1574765, 3149530, 4094389, 6299060, 8188778, 16377556, 20471945, 40943890, 81887780]

約数ペア:

[(1, 81887780), (2, 40943890), (4, 20471945), (5, 16377556), (10, 8188778), (13, 6299060), (20, 4094389), (26, 3149530), (52, 1574765), (65, 1259812), (130, 629906), (260, 314953)]