19948840

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1429}}^1$

素因数の和:1789

約数の個数: 32

約数和(自身を含む): 45045000

約数和(自身を除く): 25096160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1429, 1745, 2792, 2858, 3490, 5716, 6980, 7145, 11432, 13960, 14290, 28580, 57160, 498721, 997442, 1994884, 2493605, 3989768, 4987210, 9974420, 19948840]

約数ペア:

[(1, 19948840), (2, 9974420), (4, 4987210), (5, 3989768), (8, 2493605), (10, 1994884), (20, 997442), (40, 498721), (349, 57160), (698, 28580), (1396, 14290), (1429, 13960), (1745, 11432), (2792, 7145), (2858, 6980), (3490, 5716)]