281240

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:179

約数の個数: 32

約数和(自身を含む): 648000

約数和(自身を除く): 366760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 89, 158, 178, 316, 356, 395, 445, 632, 712, 790, 890, 1580, 1780, 3160, 3560, 7031, 14062, 28124, 35155, 56248, 70310, 140620, 281240]

約数ペア:

[(1, 281240), (2, 140620), (4, 70310), (5, 56248), (8, 35155), (10, 28124), (20, 14062), (40, 7031), (79, 3560), (89, 3160), (158, 1780), (178, 1580), (316, 890), (356, 790), (395, 712), (445, 632)]