18901995

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{25717}}^1$

素因数の和:25739

約数の個数: 24

約数和(自身を含む): 35182224

約数和(自身を除く): 16280229

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 25717, 77151, 128585, 180019, 385755, 540057, 900095, 1260133, 2700285, 3780399, 6300665, 18901995]

約数ペア:

[(1, 18901995), (3, 6300665), (5, 3780399), (7, 2700285), (15, 1260133), (21, 900095), (35, 540057), (49, 385755), (105, 180019), (147, 128585), (245, 77151), (735, 25717)]