20403880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72871}}^1$

素因数の和:72889

約数の個数: 32

約数和(自身を含む): 52467840

約数和(自身を除く): 32063960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72871, 145742, 291484, 364355, 510097, 582968, 728710, 1020194, 1457420, 2040388, 2550485, 2914840, 4080776, 5100970, 10201940, 20403880]

約数ペア:

[(1, 20403880), (2, 10201940), (4, 5100970), (5, 4080776), (7, 2914840), (8, 2550485), (10, 2040388), (14, 1457420), (20, 1020194), (28, 728710), (35, 582968), (40, 510097), (56, 364355), (70, 291484), (140, 145742), (280, 72871)]