20280904

素因数分解:

$2^3\times 7^3\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:435

約数の個数: 64

約数和(自身を含む): 46800000

約数和(自身を除く): 26519096

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 49, 56, 76, 98, 133, 152, 196, 266, 343, 389, 392, 532, 686, 778, 931, 1064, 1372, 1556, 1862, 2723, 2744, 3112, 3724, 5446, 6517, 7391, 7448, 10892, 13034, 14782, 19061, 21784, 26068, 29564, 38122, 51737, 52136, 59128, 76244, 103474, 133427, 152488, 206948, 266854, 362159, 413896, 533708, 724318, 1067416, 1448636, 2535113, 2897272, 5070226, 10140452, 20280904]

約数ペア:

[(1, 20280904), (2, 10140452), (4, 5070226), (7, 2897272), (8, 2535113), (14, 1448636), (19, 1067416), (28, 724318), (38, 533708), (49, 413896), (56, 362159), (76, 266854), (98, 206948), (133, 152488), (152, 133427), (196, 103474), (266, 76244), (343, 59128), (389, 52136), (392, 51737), (532, 38122), (686, 29564), (778, 26068), (931, 21784), (1064, 19061), (1372, 14782), (1556, 13034), (1862, 10892), (2723, 7448), (2744, 7391), (3112, 6517), (3724, 5446)]