205121960

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{12917}}^1$

素因数の和:13325

約数の個数: 32

約数和(自身を含む): 462722760

約数和(自身を除く): 257600800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 12917, 15880, 25834, 51668, 64585, 103336, 129170, 258340, 516680, 5128049, 10256098, 20512196, 25640245, 41024392, 51280490, 102560980, 205121960]

約数ペア:

[(1, 205121960), (2, 102560980), (4, 51280490), (5, 41024392), (8, 25640245), (10, 20512196), (20, 10256098), (40, 5128049), (397, 516680), (794, 258340), (1588, 129170), (1985, 103336), (3176, 64585), (3970, 51668), (7940, 25834), (12917, 15880)]