78908120

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{3049}}^1$

素因数の和:3707

約数の個数: 32

約数和(自身を含む): 177876000

約数和(自身を除く): 98967880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 2588, 3049, 3235, 5176, 6098, 6470, 12196, 12940, 15245, 24392, 25880, 30490, 60980, 121960, 1972703, 3945406, 7890812, 9863515, 15781624, 19727030, 39454060, 78908120]

約数ペア:

[(1, 78908120), (2, 39454060), (4, 19727030), (5, 15781624), (8, 9863515), (10, 7890812), (20, 3945406), (40, 1972703), (647, 121960), (1294, 60980), (2588, 30490), (3049, 25880), (3235, 24392), (5176, 15245), (6098, 12940), (6470, 12196)]