21457860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{8317}}^1$

素因数の和:8372

約数の個数: 48

約数和(自身を含む): 61486656

約数和(自身を除く): 40028796

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 215, 258, 430, 516, 645, 860, 1290, 2580, 8317, 16634, 24951, 33268, 41585, 49902, 83170, 99804, 124755, 166340, 249510, 357631, 499020, 715262, 1072893, 1430524, 1788155, 2145786, 3576310, 4291572, 5364465, 7152620, 10728930, 21457860]

約数ペア:

[(1, 21457860), (2, 10728930), (3, 7152620), (4, 5364465), (5, 4291572), (6, 3576310), (10, 2145786), (12, 1788155), (15, 1430524), (20, 1072893), (30, 715262), (43, 499020), (60, 357631), (86, 249510), (129, 166340), (172, 124755), (215, 99804), (258, 83170), (430, 49902), (516, 41585), (645, 33268), (860, 24951), (1290, 16634), (2580, 8317)]