21505980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1579}}^1$

素因数の和:1818

約数の個数: 48

約数和(自身を含む): 60520320

約数和(自身を除く): 39014340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 227, 454, 681, 908, 1135, 1362, 1579, 2270, 2724, 3158, 3405, 4540, 4737, 6316, 6810, 7895, 9474, 13620, 15790, 18948, 23685, 31580, 47370, 94740, 358433, 716866, 1075299, 1433732, 1792165, 2150598, 3584330, 4301196, 5376495, 7168660, 10752990, 21505980]

約数ペア:

[(1, 21505980), (2, 10752990), (3, 7168660), (4, 5376495), (5, 4301196), (6, 3584330), (10, 2150598), (12, 1792165), (15, 1433732), (20, 1075299), (30, 716866), (60, 358433), (227, 94740), (454, 47370), (681, 31580), (908, 23685), (1135, 18948), (1362, 15790), (1579, 13620), (2270, 9474), (2724, 7895), (3158, 6810), (3405, 6316), (4540, 4737)]