81043880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49417}}^1$

素因数の和:49469

約数の個数: 32

約数和(自身を含む): 186800040

約数和(自身を除く): 105756160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49417, 98834, 197668, 247085, 395336, 494170, 988340, 1976680, 2026097, 4052194, 8104388, 10130485, 16208776, 20260970, 40521940, 81043880]

約数ペア:

[(1, 81043880), (2, 40521940), (4, 20260970), (5, 16208776), (8, 10130485), (10, 8104388), (20, 4052194), (40, 2026097), (41, 1976680), (82, 988340), (164, 494170), (205, 395336), (328, 247085), (410, 197668), (820, 98834), (1640, 49417)]