17721970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{619}}^1$

素因数の和:1042

約数の個数: 32

約数和(自身を含む): 36604800

約数和(自身を除く): 18882830

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 409, 619, 818, 1238, 2045, 2863, 3095, 4090, 4333, 5726, 6190, 8666, 14315, 21665, 28630, 43330, 253171, 506342, 1265855, 1772197, 2531710, 3544394, 8860985, 17721970]

約数ペア:

[(1, 17721970), (2, 8860985), (5, 3544394), (7, 2531710), (10, 1772197), (14, 1265855), (35, 506342), (70, 253171), (409, 43330), (619, 28630), (818, 21665), (1238, 14315), (2045, 8666), (2863, 6190), (3095, 5726), (4090, 4333)]