21385420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{152753}}^1$

素因数の和:152769

約数の個数: 24

約数和(自身を含む): 51325344

約数和(自身を除く): 29939924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 152753, 305506, 611012, 763765, 1069271, 1527530, 2138542, 3055060, 4277084, 5346355, 10692710, 21385420]

約数ペア:

[(1, 21385420), (2, 10692710), (4, 5346355), (5, 4277084), (7, 3055060), (10, 2138542), (14, 1527530), (20, 1069271), (28, 763765), (35, 611012), (70, 305506), (140, 152753)]