81804160

素因数分解:

$2^7\times 5^1\times {\mathrm{127819}}^1$

素因数の和:127838

約数の個数: 32

約数和(自身を含む): 195564600

約数和(自身を除く): 113760440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127819, 255638, 511276, 639095, 1022552, 1278190, 2045104, 2556380, 4090208, 5112760, 8180416, 10225520, 16360832, 20451040, 40902080, 81804160]

約数ペア:

[(1, 81804160), (2, 40902080), (4, 20451040), (5, 16360832), (8, 10225520), (10, 8180416), (16, 5112760), (20, 4090208), (32, 2556380), (40, 2045104), (64, 1278190), (80, 1022552), (128, 639095), (160, 511276), (320, 255638), (640, 127819)]