21712575

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{307}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 38497536

約数和(自身を除く): 16784961

約数列:

[1, 3, 5, 15, 23, 25, 41, 69, 75, 115, 123, 205, 307, 345, 575, 615, 921, 943, 1025, 1535, 1725, 2829, 3075, 4605, 4715, 7061, 7675, 12587, 14145, 21183, 23025, 23575, 35305, 37761, 62935, 70725, 105915, 176525, 188805, 289501, 314675, 529575, 868503, 944025, 1447505, 4342515, 7237525, 21712575]

約数ペア:

[(1, 21712575), (3, 7237525), (5, 4342515), (15, 1447505), (23, 944025), (25, 868503), (41, 529575), (69, 314675), (75, 289501), (115, 188805), (123, 176525), (205, 105915), (307, 70725), (345, 62935), (575, 37761), (615, 35305), (921, 23575), (943, 23025), (1025, 21183), (1535, 14145), (1725, 12587), (2829, 7675), (3075, 7061), (4605, 4715)]