81301960

素因数分解:

$2^3\times 5^1\times {\mathrm{461}}^1\times {\mathrm{4409}}^1$

素因数の和:4881

約数の個数: 32

約数和(自身を含む): 183367800

約数和(自身を除く): 102065840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 461, 922, 1844, 2305, 3688, 4409, 4610, 8818, 9220, 17636, 18440, 22045, 35272, 44090, 88180, 176360, 2032549, 4065098, 8130196, 10162745, 16260392, 20325490, 40650980, 81301960]

約数ペア:

[(1, 81301960), (2, 40650980), (4, 20325490), (5, 16260392), (8, 10162745), (10, 8130196), (20, 4065098), (40, 2032549), (461, 176360), (922, 88180), (1844, 44090), (2305, 35272), (3688, 22045), (4409, 18440), (4610, 17636), (8818, 9220)]