20993860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{547}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 46952640

約数和(自身を除く): 25958780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 101, 190, 202, 380, 404, 505, 547, 1010, 1094, 1919, 2020, 2188, 2735, 3838, 5470, 7676, 9595, 10393, 10940, 19190, 20786, 38380, 41572, 51965, 55247, 103930, 110494, 207860, 220988, 276235, 552470, 1049693, 1104940, 2099386, 4198772, 5248465, 10496930, 20993860]

約数ペア:

[(1, 20993860), (2, 10496930), (4, 5248465), (5, 4198772), (10, 2099386), (19, 1104940), (20, 1049693), (38, 552470), (76, 276235), (95, 220988), (101, 207860), (190, 110494), (202, 103930), (380, 55247), (404, 51965), (505, 41572), (547, 38380), (1010, 20786), (1094, 19190), (1919, 10940), (2020, 10393), (2188, 9595), (2735, 7676), (3838, 5470)]