20722760

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5821}}^1$

素因数の和:5921

約数の個数: 32

約数和(自身を含む): 47158200

約数和(自身を除く): 26435440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5821, 11642, 23284, 29105, 46568, 58210, 116420, 232840, 518069, 1036138, 2072276, 2590345, 4144552, 5180690, 10361380, 20722760]

約数ペア:

[(1, 20722760), (2, 10361380), (4, 5180690), (5, 4144552), (8, 2590345), (10, 2072276), (20, 1036138), (40, 518069), (89, 232840), (178, 116420), (356, 58210), (445, 46568), (712, 29105), (890, 23284), (1780, 11642), (3560, 5821)]