20481650

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{421}}^1$

素因数の和:579

約数の個数: 48

約数和(自身を含む): 43955520

約数和(自身を除く): 23473870

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 139, 175, 278, 350, 421, 695, 842, 973, 1390, 1946, 2105, 2947, 3475, 4210, 4865, 5894, 6950, 9730, 10525, 14735, 21050, 24325, 29470, 48650, 58519, 73675, 117038, 147350, 292595, 409633, 585190, 819266, 1462975, 2048165, 2925950, 4096330, 10240825, 20481650]

約数ペア:

[(1, 20481650), (2, 10240825), (5, 4096330), (7, 2925950), (10, 2048165), (14, 1462975), (25, 819266), (35, 585190), (50, 409633), (70, 292595), (139, 147350), (175, 117038), (278, 73675), (350, 58519), (421, 48650), (695, 29470), (842, 24325), (973, 21050), (1390, 14735), (1946, 10525), (2105, 9730), (2947, 6950), (3475, 5894), (4210, 4865)]