131221120

素因数分解:

$2^7\times 5^1\times {\mathrm{205033}}^1$

素因数の和:205052

約数の個数: 32

約数和(自身を含む): 313702020

約数和(自身を除く): 182480900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 205033, 410066, 820132, 1025165, 1640264, 2050330, 3280528, 4100660, 6561056, 8201320, 13122112, 16402640, 26244224, 32805280, 65610560, 131221120]

約数ペア:

[(1, 131221120), (2, 65610560), (4, 32805280), (5, 26244224), (8, 16402640), (10, 13122112), (16, 8201320), (20, 6561056), (32, 4100660), (40, 3280528), (64, 2050330), (80, 1640264), (128, 1025165), (160, 820132), (320, 410066), (640, 205033)]