81348980

素因数分解:

$2^2\times 5^1\times {\mathrm{619}}^1\times {\mathrm{6571}}^1$

素因数の和:7199

約数の個数: 24

約数和(自身を含む): 171134880

約数和(自身を除く): 89785900

約数列:

[1, 2, 4, 5, 10, 20, 619, 1238, 2476, 3095, 6190, 6571, 12380, 13142, 26284, 32855, 65710, 131420, 4067449, 8134898, 16269796, 20337245, 40674490, 81348980]

約数ペア:

[(1, 81348980), (2, 40674490), (4, 20337245), (5, 16269796), (10, 8134898), (20, 4067449), (619, 131420), (1238, 65710), (2476, 32855), (3095, 26284), (6190, 13142), (6571, 12380)]