28720845

素因数分解:

$3^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2693}}^1$

素因数の和:2786

約数の個数: 32

約数和(自身を含む): 51724800

約数和(自身を除く): 23003955

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 135, 237, 395, 711, 1185, 2133, 2693, 3555, 8079, 10665, 13465, 24237, 40395, 72711, 121185, 212747, 363555, 638241, 1063735, 1914723, 3191205, 5744169, 9573615, 28720845]

約数ペア:

[(1, 28720845), (3, 9573615), (5, 5744169), (9, 3191205), (15, 1914723), (27, 1063735), (45, 638241), (79, 363555), (135, 212747), (237, 121185), (395, 72711), (711, 40395), (1185, 24237), (2133, 13465), (2693, 10665), (3555, 8079)]