21244760

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3821}}^1$

素因数の和:3971

約数の個数: 32

約数和(自身を含む): 48157200

約数和(自身を除く): 26912440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3821, 5560, 7642, 15284, 19105, 30568, 38210, 76420, 152840, 531119, 1062238, 2124476, 2655595, 4248952, 5311190, 10622380, 21244760]

約数ペア:

[(1, 21244760), (2, 10622380), (4, 5311190), (5, 4248952), (8, 2655595), (10, 2124476), (20, 1062238), (40, 531119), (139, 152840), (278, 76420), (556, 38210), (695, 30568), (1112, 19105), (1390, 15284), (2780, 7642), (3821, 5560)]