20197870840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72135253}}^1$

素因数の和:72135271

約数の個数: 32

約数和(自身を含む): 51937382880

約数和(自身を除く): 31739512040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72135253, 144270506, 288541012, 360676265, 504946771, 577082024, 721352530, 1009893542, 1442705060, 2019787084, 2524733855, 2885410120, 4039574168, 5049467710, 10098935420, 20197870840]

約数ペア:

[(1, 20197870840), (2, 10098935420), (4, 5049467710), (5, 4039574168), (7, 2885410120), (8, 2524733855), (10, 2019787084), (14, 1442705060), (20, 1009893542), (28, 721352530), (35, 577082024), (40, 504946771), (56, 360676265), (70, 288541012), (140, 144270506), (280, 72135253)]