20345787

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 39338208

約数和(自身を除く): 18992421

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 121, 153, 157, 187, 231, 357, 363, 471, 561, 693, 847, 1071, 1089, 1099, 1309, 1413, 1683, 1727, 2057, 2541, 2669, 3297, 3927, 5181, 6171, 7623, 8007, 9891, 11781, 12089, 14399, 15543, 18513, 18683, 18997, 24021, 29359, 36267, 43197, 56049, 56991, 88077, 108801, 129591, 132979, 168147, 170973, 205513, 264231, 322949, 398937, 616539, 968847, 1196811, 1849617, 2260643, 2906541, 6781929, 20345787]

約数ペア:

[(1, 20345787), (3, 6781929), (7, 2906541), (9, 2260643), (11, 1849617), (17, 1196811), (21, 968847), (33, 616539), (51, 398937), (63, 322949), (77, 264231), (99, 205513), (119, 170973), (121, 168147), (153, 132979), (157, 129591), (187, 108801), (231, 88077), (357, 56991), (363, 56049), (471, 43197), (561, 36267), (693, 29359), (847, 24021), (1071, 18997), (1089, 18683), (1099, 18513), (1309, 15543), (1413, 14399), (1683, 12089), (1727, 11781), (2057, 9891), (2541, 8007), (2669, 7623), (3297, 6171), (3927, 5181)]