20042540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{599}}^1$

素因数の和:854

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 28341460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 239, 478, 599, 956, 1195, 1198, 1673, 2390, 2396, 2995, 3346, 4193, 4780, 5990, 6692, 8365, 8386, 11980, 16730, 16772, 20965, 33460, 41930, 83860, 143161, 286322, 572644, 715805, 1002127, 1431610, 2004254, 2863220, 4008508, 5010635, 10021270, 20042540]

約数ペア:

[(1, 20042540), (2, 10021270), (4, 5010635), (5, 4008508), (7, 2863220), (10, 2004254), (14, 1431610), (20, 1002127), (28, 715805), (35, 572644), (70, 286322), (140, 143161), (239, 83860), (478, 41930), (599, 33460), (956, 20965), (1195, 16772), (1198, 16730), (1673, 11980), (2390, 8386), (2396, 8365), (2995, 6692), (3346, 5990), (4193, 4780)]