80415980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1\times {\mathrm{491}}^1$

素因数の和:950

約数の個数: 48

約数和(自身を含む): 178536960

約数和(自身を除く): 98120980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 431, 491, 862, 982, 1724, 1964, 2155, 2455, 4310, 4910, 8189, 8620, 9329, 9820, 16378, 18658, 32756, 37316, 40945, 46645, 81890, 93290, 163780, 186580, 211621, 423242, 846484, 1058105, 2116210, 4020799, 4232420, 8041598, 16083196, 20103995, 40207990, 80415980]

約数ペア:

[(1, 80415980), (2, 40207990), (4, 20103995), (5, 16083196), (10, 8041598), (19, 4232420), (20, 4020799), (38, 2116210), (76, 1058105), (95, 846484), (190, 423242), (380, 211621), (431, 186580), (491, 163780), (862, 93290), (982, 81890), (1724, 46645), (1964, 40945), (2155, 37316), (2455, 32756), (4310, 18658), (4910, 16378), (8189, 9820), (8620, 9329)]