18904720

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3527}}^1$

素因数の和:3607

約数の個数: 40

約数和(自身を含む): 44622144

約数和(自身を除く): 25717424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3527, 5360, 7054, 14108, 17635, 28216, 35270, 56432, 70540, 141080, 236309, 282160, 472618, 945236, 1181545, 1890472, 2363090, 3780944, 4726180, 9452360, 18904720]

約数ペア:

[(1, 18904720), (2, 9452360), (4, 4726180), (5, 3780944), (8, 2363090), (10, 1890472), (16, 1181545), (20, 945236), (40, 472618), (67, 282160), (80, 236309), (134, 141080), (268, 70540), (335, 56432), (536, 35270), (670, 28216), (1072, 17635), (1340, 14108), (2680, 7054), (3527, 5360)]