21497720

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3607}}^1$

素因数の和:3767

約数の個数: 32

約数和(自身を含む): 48708000

約数和(自身を除く): 27210280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 3607, 5960, 7214, 14428, 18035, 28856, 36070, 72140, 144280, 537443, 1074886, 2149772, 2687215, 4299544, 5374430, 10748860, 21497720]

約数ペア:

[(1, 21497720), (2, 10748860), (4, 5374430), (5, 4299544), (8, 2687215), (10, 2149772), (20, 1074886), (40, 537443), (149, 144280), (298, 72140), (596, 36070), (745, 28856), (1192, 18035), (1490, 14428), (2980, 7214), (3607, 5960)]