21182840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75653}}^1$

素因数の和:75671

約数の個数: 32

約数和(自身を含む): 54470880

約数和(自身を除く): 33288040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75653, 151306, 302612, 378265, 529571, 605224, 756530, 1059142, 1513060, 2118284, 2647855, 3026120, 4236568, 5295710, 10591420, 21182840]

約数ペア:

[(1, 21182840), (2, 10591420), (4, 5295710), (5, 4236568), (7, 3026120), (8, 2647855), (10, 2118284), (14, 1513060), (20, 1059142), (28, 756530), (35, 605224), (40, 529571), (56, 378265), (70, 302612), (140, 151306), (280, 75653)]