81127040

素因数分解:

$2^7\times 5^1\times {\mathrm{126761}}^1$

素因数の和:126780

約数の個数: 32

約数和(自身を含む): 193945860

約数和(自身を除く): 112818820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 126761, 253522, 507044, 633805, 1014088, 1267610, 2028176, 2535220, 4056352, 5070440, 8112704, 10140880, 16225408, 20281760, 40563520, 81127040]

約数ペア:

[(1, 81127040), (2, 40563520), (4, 20281760), (5, 16225408), (8, 10140880), (10, 8112704), (16, 5070440), (20, 4056352), (32, 2535220), (40, 2028176), (64, 1267610), (80, 1014088), (128, 633805), (160, 507044), (320, 253522), (640, 126761)]