81909860

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1559}}^1$

素因数の和:1676

約数の個数: 48

約数和(自身を含む): 179262720

約数和(自身を除く): 97352860

約数列:

[1, 2, 4, 5, 10, 20, 37, 71, 74, 142, 148, 185, 284, 355, 370, 710, 740, 1420, 1559, 2627, 3118, 5254, 6236, 7795, 10508, 13135, 15590, 26270, 31180, 52540, 57683, 110689, 115366, 221378, 230732, 288415, 442756, 553445, 576830, 1106890, 1153660, 2213780, 4095493, 8190986, 16381972, 20477465, 40954930, 81909860]

約数ペア:

[(1, 81909860), (2, 40954930), (4, 20477465), (5, 16381972), (10, 8190986), (20, 4095493), (37, 2213780), (71, 1153660), (74, 1106890), (142, 576830), (148, 553445), (185, 442756), (284, 288415), (355, 230732), (370, 221378), (710, 115366), (740, 110689), (1420, 57683), (1559, 52540), (2627, 31180), (3118, 26270), (5254, 15590), (6236, 13135), (7795, 10508)]