18989944

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 36720000

約数和(自身を除く): 17730056

約数列:

[1, 2, 4, 8, 67, 71, 134, 142, 268, 284, 499, 536, 568, 998, 1996, 3992, 4757, 9514, 19028, 33433, 35429, 38056, 66866, 70858, 133732, 141716, 267464, 283432, 2373743, 4747486, 9494972, 18989944]

約数ペア:

[(1, 18989944), (2, 9494972), (4, 4747486), (8, 2373743), (67, 283432), (71, 267464), (134, 141716), (142, 133732), (268, 70858), (284, 66866), (499, 38056), (536, 35429), (568, 33433), (998, 19028), (1996, 9514), (3992, 4757)]