78197980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{7867}}^1$

素因数の和:7954

約数の個数: 48

約数和(自身を含む): 190342656

約数和(自身を除く): 112144676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 7867, 9940, 15734, 31468, 39335, 55069, 78670, 110138, 157340, 220276, 275345, 550690, 558557, 1101380, 1117114, 2234228, 2792785, 3909899, 5585570, 7819798, 11171140, 15639596, 19549495, 39098990, 78197980]

約数ペア:

[(1, 78197980), (2, 39098990), (4, 19549495), (5, 15639596), (7, 11171140), (10, 7819798), (14, 5585570), (20, 3909899), (28, 2792785), (35, 2234228), (70, 1117114), (71, 1101380), (140, 558557), (142, 550690), (284, 275345), (355, 220276), (497, 157340), (710, 110138), (994, 78670), (1420, 55069), (1988, 39335), (2485, 31468), (4970, 15734), (7867, 9940)]