21281710

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{1109}}^1$

素因数の和:1236

約数の個数: 32

約数和(自身を含む): 40759200

約数和(自身を除く): 19477490

約数列:

[1, 2, 5, 10, 19, 38, 95, 101, 190, 202, 505, 1010, 1109, 1919, 2218, 3838, 5545, 9595, 11090, 19190, 21071, 42142, 105355, 112009, 210710, 224018, 560045, 1120090, 2128171, 4256342, 10640855, 21281710]

約数ペア:

[(1, 21281710), (2, 10640855), (5, 4256342), (10, 2128171), (19, 1120090), (38, 560045), (95, 224018), (101, 210710), (190, 112009), (202, 105355), (505, 42142), (1010, 21071), (1109, 19190), (1919, 11090), (2218, 9595), (3838, 5545)]