20818840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74353}}^1$

素因数の和:74371

約数の個数: 32

約数和(自身を含む): 53534880

約数和(自身を除く): 32716040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74353, 148706, 297412, 371765, 520471, 594824, 743530, 1040942, 1487060, 2081884, 2602355, 2974120, 4163768, 5204710, 10409420, 20818840]

約数ペア:

[(1, 20818840), (2, 10409420), (4, 5204710), (5, 4163768), (7, 2974120), (8, 2602355), (10, 2081884), (14, 1487060), (20, 1040942), (28, 743530), (35, 594824), (40, 520471), (56, 371765), (70, 297412), (140, 148706), (280, 74353)]