21054460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1489}}^1$

素因数の和:1606

約数の個数: 48

約数和(自身を含む): 51065280

約数和(自身を除く): 30010820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1489, 2020, 2828, 2978, 3535, 5956, 7070, 7445, 10423, 14140, 14890, 20846, 29780, 41692, 52115, 104230, 150389, 208460, 300778, 601556, 751945, 1052723, 1503890, 2105446, 3007780, 4210892, 5263615, 10527230, 21054460]

約数ペア:

[(1, 21054460), (2, 10527230), (4, 5263615), (5, 4210892), (7, 3007780), (10, 2105446), (14, 1503890), (20, 1052723), (28, 751945), (35, 601556), (70, 300778), (101, 208460), (140, 150389), (202, 104230), (404, 52115), (505, 41692), (707, 29780), (1010, 20846), (1414, 14890), (1489, 14140), (2020, 10423), (2828, 7445), (2978, 7070), (3535, 5956)]