28129340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{15803}}^1$

素因数の和:15901

約数の個数: 24

約数和(自身を含む): 59739120

約数和(自身を除く): 31609780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 15803, 31606, 63212, 79015, 158030, 316060, 1406467, 2812934, 5625868, 7032335, 14064670, 28129340]

約数ペア:

[(1, 28129340), (2, 14064670), (4, 7032335), (5, 5625868), (10, 2812934), (20, 1406467), (89, 316060), (178, 158030), (356, 79015), (445, 63212), (890, 31606), (1780, 15803)]