81018040

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5051}}^1$

素因数の和:5463

約数の個数: 32

約数和(自身を含む): 182781360

約数和(自身を除く): 101763320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 5051, 8020, 10102, 16040, 20204, 25255, 40408, 50510, 101020, 202040, 2025451, 4050902, 8101804, 10127255, 16203608, 20254510, 40509020, 81018040]

約数ペア:

[(1, 81018040), (2, 40509020), (4, 20254510), (5, 16203608), (8, 10127255), (10, 8101804), (20, 4050902), (40, 2025451), (401, 202040), (802, 101020), (1604, 50510), (2005, 40408), (3208, 25255), (4010, 20204), (5051, 16040), (8020, 10102)]