21005222

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{389}}^1$

素因数の和:453

約数の個数: 48

約数和(自身を含む): 40014000

約数和(自身を除く): 19008778

約数列:

[1, 2, 7, 14, 19, 29, 38, 49, 58, 98, 133, 203, 266, 389, 406, 551, 778, 931, 1102, 1421, 1862, 2723, 2842, 3857, 5446, 7391, 7714, 11281, 14782, 19061, 22562, 26999, 38122, 51737, 53998, 78967, 103474, 157934, 214339, 362159, 428678, 552769, 724318, 1105538, 1500373, 3000746, 10502611, 21005222]

約数ペア:

[(1, 21005222), (2, 10502611), (7, 3000746), (14, 1500373), (19, 1105538), (29, 724318), (38, 552769), (49, 428678), (58, 362159), (98, 214339), (133, 157934), (203, 103474), (266, 78967), (389, 53998), (406, 51737), (551, 38122), (778, 26999), (931, 22562), (1102, 19061), (1421, 14782), (1862, 11281), (2723, 7714), (2842, 7391), (3857, 5446)]