18640755

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^2$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 39772512

約数和(自身を除く): 21131757

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 59, 63, 85, 105, 119, 153, 177, 255, 295, 315, 357, 413, 531, 595, 765, 885, 1003, 1071, 1239, 1785, 2065, 2655, 3009, 3481, 3717, 5015, 5355, 6195, 7021, 9027, 10443, 15045, 17405, 18585, 21063, 24367, 31329, 35105, 45135, 52215, 59177, 63189, 73101, 105315, 121835, 156645, 177531, 219303, 295885, 315945, 365505, 414239, 532593, 887655, 1096515, 1242717, 2071195, 2662965, 3728151, 6213585, 18640755]

約数ペア:

[(1, 18640755), (3, 6213585), (5, 3728151), (7, 2662965), (9, 2071195), (15, 1242717), (17, 1096515), (21, 887655), (35, 532593), (45, 414239), (51, 365505), (59, 315945), (63, 295885), (85, 219303), (105, 177531), (119, 156645), (153, 121835), (177, 105315), (255, 73101), (295, 63189), (315, 59177), (357, 52215), (413, 45135), (531, 35105), (595, 31329), (765, 24367), (885, 21063), (1003, 18585), (1071, 17405), (1239, 15045), (1785, 10443), (2065, 9027), (2655, 7021), (3009, 6195), (3481, 5355), (3717, 5015)]