81908920

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{28051}}^1$

素因数の和:28135

約数の個数: 32

約数和(自身を含む): 186826320

約数和(自身を除く): 104917400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 28051, 56102, 112204, 140255, 224408, 280510, 561020, 1122040, 2047723, 4095446, 8190892, 10238615, 16381784, 20477230, 40954460, 81908920]

約数ペア:

[(1, 81908920), (2, 40954460), (4, 20477230), (5, 16381784), (8, 10238615), (10, 8190892), (20, 4095446), (40, 2047723), (73, 1122040), (146, 561020), (292, 280510), (365, 224408), (584, 140255), (730, 112204), (1460, 56102), (2920, 28051)]