18061660

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 39160800

約数和(自身を除く): 21099140

約数列:

[1, 2, 4, 5, 10, 20, 73, 89, 139, 146, 178, 278, 292, 356, 365, 445, 556, 695, 730, 890, 1390, 1460, 1780, 2780, 6497, 10147, 12371, 12994, 20294, 24742, 25988, 32485, 40588, 49484, 50735, 61855, 64970, 101470, 123710, 129940, 202940, 247420, 903083, 1806166, 3612332, 4515415, 9030830, 18061660]

約数ペア:

[(1, 18061660), (2, 9030830), (4, 4515415), (5, 3612332), (10, 1806166), (20, 903083), (73, 247420), (89, 202940), (139, 129940), (146, 123710), (178, 101470), (278, 64970), (292, 61855), (356, 50735), (365, 49484), (445, 40588), (556, 32485), (695, 25988), (730, 24742), (890, 20294), (1390, 12994), (1460, 12371), (1780, 10147), (2780, 6497)]