19998784

素因数分解:

$2^6\times {\mathrm{13}}^2\times {\mathrm{43}}^2$

素因数の和:124

約数の個数: 63

約数和(自身を含む): 43995213

約数和(自身を除く): 23996429

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 64, 86, 104, 169, 172, 208, 338, 344, 416, 559, 676, 688, 832, 1118, 1352, 1376, 1849, 2236, 2704, 2752, 3698, 4472, 5408, 7267, 7396, 8944, 10816, 14534, 14792, 17888, 24037, 29068, 29584, 35776, 48074, 58136, 59168, 96148, 116272, 118336, 192296, 232544, 312481, 384592, 465088, 624962, 769184, 1249924, 1538368, 2499848, 4999696, 9999392, 19998784]

約数ペア:

[(1, 19998784), (2, 9999392), (4, 4999696), (8, 2499848), (13, 1538368), (16, 1249924), (26, 769184), (32, 624962), (43, 465088), (52, 384592), (64, 312481), (86, 232544), (104, 192296), (169, 118336), (172, 116272), (208, 96148), (338, 59168), (344, 58136), (416, 48074), (559, 35776), (676, 29584), (688, 29068), (832, 24037), (1118, 17888), (1352, 14792), (1376, 14534), (1849, 10816), (2236, 8944), (2704, 7396), (2752, 7267), (3698, 5408)]