21054705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{839}}^1$

素因数の和:1093

約数の個数: 32

約数和(自身を含む): 38707200

約数和(自身を除く): 17652495

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 239, 717, 839, 1195, 1673, 2517, 3585, 4195, 5019, 5873, 8365, 12585, 17619, 25095, 29365, 88095, 200521, 601563, 1002605, 1403647, 3007815, 4210941, 7018235, 21054705]

約数ペア:

[(1, 21054705), (3, 7018235), (5, 4210941), (7, 3007815), (15, 1403647), (21, 1002605), (35, 601563), (105, 200521), (239, 88095), (717, 29365), (839, 25095), (1195, 17619), (1673, 12585), (2517, 8365), (3585, 5873), (4195, 5019)]