18517420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{509}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 41640480

約数和(自身を除く): 23123060

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 107, 170, 214, 340, 428, 509, 535, 1018, 1070, 1819, 2036, 2140, 2545, 3638, 5090, 7276, 8653, 9095, 10180, 17306, 18190, 34612, 36380, 43265, 54463, 86530, 108926, 173060, 217852, 272315, 544630, 925871, 1089260, 1851742, 3703484, 4629355, 9258710, 18517420]

約数ペア:

[(1, 18517420), (2, 9258710), (4, 4629355), (5, 3703484), (10, 1851742), (17, 1089260), (20, 925871), (34, 544630), (68, 272315), (85, 217852), (107, 173060), (170, 108926), (214, 86530), (340, 54463), (428, 43265), (509, 36380), (535, 34612), (1018, 18190), (1070, 17306), (1819, 10180), (2036, 9095), (2140, 8653), (2545, 7276), (3638, 5090)]