19810840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70753}}^1$

素因数の和:70771

約数の個数: 32

約数和(自身を含む): 50942880

約数和(自身を除く): 31132040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70753, 141506, 283012, 353765, 495271, 566024, 707530, 990542, 1415060, 1981084, 2476355, 2830120, 3962168, 4952710, 9905420, 19810840]

約数ペア:

[(1, 19810840), (2, 9905420), (4, 4952710), (5, 3962168), (7, 2830120), (8, 2476355), (10, 1981084), (14, 1415060), (20, 990542), (28, 707530), (35, 566024), (40, 495271), (56, 353765), (70, 283012), (140, 141506), (280, 70753)]