20445675

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 35518560

約数和(自身を除く): 15072885

約数列:

[1, 3, 5, 15, 25, 41, 61, 75, 109, 123, 183, 205, 305, 327, 545, 615, 915, 1025, 1525, 1635, 2501, 2725, 3075, 4469, 4575, 6649, 7503, 8175, 12505, 13407, 19947, 22345, 33245, 37515, 62525, 67035, 99735, 111725, 166225, 187575, 272609, 335175, 498675, 817827, 1363045, 4089135, 6815225, 20445675]

約数ペア:

[(1, 20445675), (3, 6815225), (5, 4089135), (15, 1363045), (25, 817827), (41, 498675), (61, 335175), (75, 272609), (109, 187575), (123, 166225), (183, 111725), (205, 99735), (305, 67035), (327, 62525), (545, 37515), (615, 33245), (915, 22345), (1025, 19947), (1525, 13407), (1635, 12505), (2501, 8175), (2725, 7503), (3075, 6649), (4469, 4575)]