19978275

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 34685280

約数和(自身を除く): 14707005

約数列:

[1, 3, 5, 15, 25, 41, 73, 75, 89, 123, 205, 219, 267, 365, 445, 615, 1025, 1095, 1335, 1825, 2225, 2993, 3075, 3649, 5475, 6497, 6675, 8979, 10947, 14965, 18245, 19491, 32485, 44895, 54735, 74825, 91225, 97455, 162425, 224475, 266377, 273675, 487275, 799131, 1331885, 3995655, 6659425, 19978275]

約数ペア:

[(1, 19978275), (3, 6659425), (5, 3995655), (15, 1331885), (25, 799131), (41, 487275), (73, 273675), (75, 266377), (89, 224475), (123, 162425), (205, 97455), (219, 91225), (267, 74825), (365, 54735), (445, 44895), (615, 32485), (1025, 19491), (1095, 18245), (1335, 14965), (1825, 10947), (2225, 8979), (2993, 6675), (3075, 6497), (3649, 5475)]