21418947

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{193}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 36316800

約数和(自身を除く): 14897853

約数列:

[1, 3, 9, 11, 19, 33, 57, 59, 99, 171, 177, 193, 209, 531, 579, 627, 649, 1121, 1737, 1881, 1947, 2123, 3363, 3667, 5841, 6369, 10089, 11001, 11387, 12331, 19107, 33003, 34161, 36993, 40337, 102483, 110979, 121011, 125257, 216353, 363033, 375771, 649059, 1127313, 1947177, 2379883, 7139649, 21418947]

約数ペア:

[(1, 21418947), (3, 7139649), (9, 2379883), (11, 1947177), (19, 1127313), (33, 649059), (57, 375771), (59, 363033), (99, 216353), (171, 125257), (177, 121011), (193, 110979), (209, 102483), (531, 40337), (579, 36993), (627, 34161), (649, 33003), (1121, 19107), (1737, 12331), (1881, 11387), (1947, 11001), (2123, 10089), (3363, 6369), (3667, 5841)]