20697825

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 35997696

約数和(自身を除く): 15299871

約数列:

[1, 3, 5, 15, 25, 41, 53, 75, 123, 127, 159, 205, 265, 381, 615, 635, 795, 1025, 1325, 1905, 2173, 3075, 3175, 3975, 5207, 6519, 6731, 9525, 10865, 15621, 20193, 26035, 32595, 33655, 54325, 78105, 100965, 130175, 162975, 168275, 275971, 390525, 504825, 827913, 1379855, 4139565, 6899275, 20697825]

約数ペア:

[(1, 20697825), (3, 6899275), (5, 4139565), (15, 1379855), (25, 827913), (41, 504825), (53, 390525), (75, 275971), (123, 168275), (127, 162975), (159, 130175), (205, 100965), (265, 78105), (381, 54325), (615, 33655), (635, 32595), (795, 26035), (1025, 20193), (1325, 15621), (1905, 10865), (2173, 9525), (3075, 6731), (3175, 6519), (3975, 5207)]