2721620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 6350400

約数和(自身を除く): 3628780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 139, 178, 220, 278, 356, 445, 556, 695, 890, 979, 1390, 1529, 1780, 1958, 2780, 3058, 3916, 4895, 6116, 7645, 9790, 12371, 15290, 19580, 24742, 30580, 49484, 61855, 123710, 136081, 247420, 272162, 544324, 680405, 1360810, 2721620]

約数ペア:

[(1, 2721620), (2, 1360810), (4, 680405), (5, 544324), (10, 272162), (11, 247420), (20, 136081), (22, 123710), (44, 61855), (55, 49484), (89, 30580), (110, 24742), (139, 19580), (178, 15290), (220, 12371), (278, 9790), (356, 7645), (445, 6116), (556, 4895), (695, 3916), (890, 3058), (979, 2780), (1390, 1958), (1529, 1780)]