21130025

素因数分解:

$5^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{367}}^1$

素因数の和:438

約数の個数: 36

約数和(自身を含む): 31212288

約数和(自身を除く): 10082263

約数列:

[1, 5, 7, 25, 35, 47, 49, 175, 235, 245, 329, 367, 1175, 1225, 1645, 1835, 2303, 2569, 8225, 9175, 11515, 12845, 17249, 17983, 57575, 64225, 86245, 89915, 120743, 431225, 449575, 603715, 845201, 3018575, 4226005, 21130025]

約数ペア:

[(1, 21130025), (5, 4226005), (7, 3018575), (25, 845201), (35, 603715), (47, 449575), (49, 431225), (175, 120743), (235, 89915), (245, 86245), (329, 64225), (367, 57575), (1175, 17983), (1225, 17249), (1645, 12845), (1835, 11515), (2303, 9175), (2569, 8225)]