20474895

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 38659680

約数和(自身を除く): 18184785

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 89, 105, 147, 245, 267, 313, 445, 623, 735, 939, 1335, 1565, 1869, 2191, 3115, 4361, 4695, 6573, 9345, 10955, 13083, 15337, 21805, 27857, 32865, 46011, 65415, 76685, 83571, 139285, 194999, 230055, 417855, 584997, 974995, 1364993, 2924985, 4094979, 6824965, 20474895]

約数ペア:

[(1, 20474895), (3, 6824965), (5, 4094979), (7, 2924985), (15, 1364993), (21, 974995), (35, 584997), (49, 417855), (89, 230055), (105, 194999), (147, 139285), (245, 83571), (267, 76685), (313, 65415), (445, 46011), (623, 32865), (735, 27857), (939, 21805), (1335, 15337), (1565, 13083), (1869, 10955), (2191, 9345), (3115, 6573), (4361, 4695)]