26801980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{311}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 58705920

約数和(自身を除く): 31903940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 278, 310, 311, 556, 620, 622, 695, 1244, 1390, 1555, 2780, 3110, 4309, 6220, 8618, 9641, 17236, 19282, 21545, 38564, 43090, 43229, 48205, 86180, 86458, 96410, 172916, 192820, 216145, 432290, 864580, 1340099, 2680198, 5360396, 6700495, 13400990, 26801980]

約数ペア:

[(1, 26801980), (2, 13400990), (4, 6700495), (5, 5360396), (10, 2680198), (20, 1340099), (31, 864580), (62, 432290), (124, 216145), (139, 192820), (155, 172916), (278, 96410), (310, 86458), (311, 86180), (556, 48205), (620, 43229), (622, 43090), (695, 38564), (1244, 21545), (1390, 19282), (1555, 17236), (2780, 9641), (3110, 8618), (4309, 6220)]