21159009

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 33033600

約数和(自身を除く): 11874591

約数列:

[1, 3, 9, 27, 29, 61, 87, 183, 261, 443, 549, 783, 1329, 1647, 1769, 3987, 5307, 11961, 12847, 15921, 27023, 38541, 47763, 81069, 115623, 243207, 346869, 729621, 783667, 2351001, 7053003, 21159009]

約数ペア:

[(1, 21159009), (3, 7053003), (9, 2351001), (27, 783667), (29, 729621), (61, 346869), (87, 243207), (183, 115623), (261, 81069), (443, 47763), (549, 38541), (783, 27023), (1329, 15921), (1647, 12847), (1769, 11961), (3987, 5307)]