21021245

素因数分解:

$5^1\times 7^2\times {\mathrm{239}}^1\times {\mathrm{359}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 29548800

約数和(自身を除く): 8527555

約数列:

[1, 5, 7, 35, 49, 239, 245, 359, 1195, 1673, 1795, 2513, 8365, 11711, 12565, 17591, 58555, 85801, 87955, 429005, 600607, 3003035, 4204249, 21021245]

約数ペア:

[(1, 21021245), (5, 4204249), (7, 3003035), (35, 600607), (49, 429005), (239, 87955), (245, 85801), (359, 58555), (1195, 17591), (1673, 12565), (1795, 11711), (2513, 8365)]