128753200

素因数分解:

$2^4\times 5^2\times {\mathrm{409}}^1\times {\mathrm{787}}^1$

素因数の和:1214

約数の個数: 60

約数和(自身を含む): 310479880

約数和(自身を除く): 181726680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 409, 787, 818, 1574, 1636, 2045, 3148, 3272, 3935, 4090, 6296, 6544, 7870, 8180, 10225, 12592, 15740, 16360, 19675, 20450, 31480, 32720, 39350, 40900, 62960, 78700, 81800, 157400, 163600, 314800, 321883, 643766, 1287532, 1609415, 2575064, 3218830, 5150128, 6437660, 8047075, 12875320, 16094150, 25750640, 32188300, 64376600, 128753200]

約数ペア:

[(1, 128753200), (2, 64376600), (4, 32188300), (5, 25750640), (8, 16094150), (10, 12875320), (16, 8047075), (20, 6437660), (25, 5150128), (40, 3218830), (50, 2575064), (80, 1609415), (100, 1287532), (200, 643766), (400, 321883), (409, 314800), (787, 163600), (818, 157400), (1574, 81800), (1636, 78700), (2045, 62960), (3148, 40900), (3272, 39350), (3935, 32720), (4090, 31480), (6296, 20450), (6544, 19675), (7870, 16360), (8180, 15740), (10225, 12592)]