21885885

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:163

約数の個数: 96

約数和(自身を含む): 47354112

約数和(自身を除く): 25468227

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 61, 63, 67, 85, 105, 119, 153, 183, 201, 255, 305, 315, 335, 357, 427, 469, 549, 595, 603, 765, 915, 1005, 1037, 1071, 1139, 1281, 1407, 1785, 2135, 2345, 2745, 3015, 3111, 3417, 3843, 4087, 4221, 5185, 5355, 5695, 6405, 7035, 7259, 7973, 9333, 10251, 12261, 15555, 17085, 19215, 20435, 21105, 21777, 23919, 28609, 36295, 36783, 39865, 46665, 51255, 61305, 65331, 69479, 71757, 85827, 108885, 119595, 143045, 183915, 208437, 257481, 326655, 347395, 358785, 429135, 486353, 625311, 1042185, 1287405, 1459059, 2431765, 3126555, 4377177, 7295295, 21885885]

約数ペア:

[(1, 21885885), (3, 7295295), (5, 4377177), (7, 3126555), (9, 2431765), (15, 1459059), (17, 1287405), (21, 1042185), (35, 625311), (45, 486353), (51, 429135), (61, 358785), (63, 347395), (67, 326655), (85, 257481), (105, 208437), (119, 183915), (153, 143045), (183, 119595), (201, 108885), (255, 85827), (305, 71757), (315, 69479), (335, 65331), (357, 61305), (427, 51255), (469, 46665), (549, 39865), (595, 36783), (603, 36295), (765, 28609), (915, 23919), (1005, 21777), (1037, 21105), (1071, 20435), (1139, 19215), (1281, 17085), (1407, 15555), (1785, 12261), (2135, 10251), (2345, 9333), (2745, 7973), (3015, 7259), (3111, 7035), (3417, 6405), (3843, 5695), (4087, 5355), (4221, 5185)]