257742660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{613673}}^1$

素因数の和:613692

約数の個数: 48

約数和(自身を含む): 824777856

約数和(自身を除く): 567035196

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 613673, 1227346, 1841019, 2454692, 3068365, 3682038, 4295711, 6136730, 7364076, 8591422, 9205095, 12273460, 12887133, 17182844, 18410190, 21478555, 25774266, 36820380, 42957110, 51548532, 64435665, 85914220, 128871330, 257742660]

約数ペア:

[(1, 257742660), (2, 128871330), (3, 85914220), (4, 64435665), (5, 51548532), (6, 42957110), (7, 36820380), (10, 25774266), (12, 21478555), (14, 18410190), (15, 17182844), (20, 12887133), (21, 12273460), (28, 9205095), (30, 8591422), (35, 7364076), (42, 6136730), (60, 4295711), (70, 3682038), (84, 3068365), (105, 2454692), (140, 1841019), (210, 1227346), (420, 613673)]