21666915

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16603}}^1$

素因数の和:16643

約数の個数: 24

約数和(自身を含む): 38853360

約数和(自身を除く): 17186445

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 1305, 16603, 49809, 83015, 149427, 249045, 481487, 747135, 1444461, 2407435, 4333383, 7222305, 21666915]

約数ペア:

[(1, 21666915), (3, 7222305), (5, 4333383), (9, 2407435), (15, 1444461), (29, 747135), (45, 481487), (87, 249045), (145, 149427), (261, 83015), (435, 49809), (1305, 16603)]