20860420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1367}}^1$

素因数の和:1492

約数の個数: 48

約数和(自身を含む): 50561280

約数和(自身を除く): 29700860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1367, 1526, 2180, 2734, 3052, 3815, 5468, 6835, 7630, 9569, 13670, 15260, 19138, 27340, 38276, 47845, 95690, 149003, 191380, 298006, 596012, 745015, 1043021, 1490030, 2086042, 2980060, 4172084, 5215105, 10430210, 20860420]

約数ペア:

[(1, 20860420), (2, 10430210), (4, 5215105), (5, 4172084), (7, 2980060), (10, 2086042), (14, 1490030), (20, 1043021), (28, 745015), (35, 596012), (70, 298006), (109, 191380), (140, 149003), (218, 95690), (436, 47845), (545, 38276), (763, 27340), (1090, 19138), (1367, 15260), (1526, 13670), (2180, 9569), (2734, 7630), (3052, 6835), (3815, 5468)]