40320920

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2053}}^1$

素因数の和:2555

約数の個数: 32

約数和(自身を含む): 90951120

約数和(自身を除く): 50630200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2053, 2455, 3928, 4106, 4910, 8212, 9820, 10265, 16424, 19640, 20530, 41060, 82120, 1008023, 2016046, 4032092, 5040115, 8064184, 10080230, 20160460, 40320920]

約数ペア:

[(1, 40320920), (2, 20160460), (4, 10080230), (5, 8064184), (8, 5040115), (10, 4032092), (20, 2016046), (40, 1008023), (491, 82120), (982, 41060), (1964, 20530), (2053, 19640), (2455, 16424), (3928, 10265), (4106, 9820), (4910, 8212)]