78409900

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{5641}}^1$

素因数の和:5794

約数の個数: 36

約数和(自身を含む): 171403960

約数和(自身を除く): 92994060

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 2780, 3475, 5641, 6950, 11282, 13900, 22564, 28205, 56410, 112820, 141025, 282050, 564100, 784099, 1568198, 3136396, 3920495, 7840990, 15681980, 19602475, 39204950, 78409900]

約数ペア:

[(1, 78409900), (2, 39204950), (4, 19602475), (5, 15681980), (10, 7840990), (20, 3920495), (25, 3136396), (50, 1568198), (100, 784099), (139, 564100), (278, 282050), (556, 141025), (695, 112820), (1390, 56410), (2780, 28205), (3475, 22564), (5641, 13900), (6950, 11282)]