18389920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6761}}^1$

素因数の和:6793

約数の個数: 48

約数和(自身を含む): 46008648

約数和(自身を除く): 27618728

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 6761, 13522, 27044, 33805, 54088, 67610, 108176, 114937, 135220, 216352, 229874, 270440, 459748, 540880, 574685, 919496, 1081760, 1149370, 1838992, 2298740, 3677984, 4597480, 9194960, 18389920]

約数ペア:

[(1, 18389920), (2, 9194960), (4, 4597480), (5, 3677984), (8, 2298740), (10, 1838992), (16, 1149370), (17, 1081760), (20, 919496), (32, 574685), (34, 540880), (40, 459748), (68, 270440), (80, 229874), (85, 216352), (136, 135220), (160, 114937), (170, 108176), (272, 67610), (340, 54088), (544, 33805), (680, 27044), (1360, 13522), (2720, 6761)]