21530788

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{829}}^1$

素因数の和:1027

約数の個数: 24

約数和(自身を含む): 38857280

約数和(自身を除く): 17326492

約数列:

[1, 2, 4, 43, 86, 151, 172, 302, 604, 829, 1658, 3316, 6493, 12986, 25972, 35647, 71294, 125179, 142588, 250358, 500716, 5382697, 10765394, 21530788]

約数ペア:

[(1, 21530788), (2, 10765394), (4, 5382697), (43, 500716), (86, 250358), (151, 142588), (172, 125179), (302, 71294), (604, 35647), (829, 25972), (1658, 12986), (3316, 6493)]