20857425

素因数分解:

$3^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 36164352

約数和(自身を除く): 15306927

約数列:

[1, 3, 5, 15, 25, 47, 61, 75, 97, 141, 183, 235, 291, 305, 485, 705, 915, 1175, 1455, 1525, 2425, 2867, 3525, 4559, 4575, 5917, 7275, 8601, 13677, 14335, 17751, 22795, 29585, 43005, 68385, 71675, 88755, 113975, 147925, 215025, 278099, 341925, 443775, 834297, 1390495, 4171485, 6952475, 20857425]

約数ペア:

[(1, 20857425), (3, 6952475), (5, 4171485), (15, 1390495), (25, 834297), (47, 443775), (61, 341925), (75, 278099), (97, 215025), (141, 147925), (183, 113975), (235, 88755), (291, 71675), (305, 68385), (485, 43005), (705, 29585), (915, 22795), (1175, 17751), (1455, 14335), (1525, 13677), (2425, 8601), (2867, 7275), (3525, 5917), (4559, 4575)]