20887713

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1$

素因数の和:244

約数の個数: 80

約数和(自身を含む): 41399424

約数和(自身を除く): 20511711

約数列:

[1, 3, 7, 9, 11, 17, 21, 27, 33, 51, 63, 77, 81, 99, 119, 153, 187, 189, 197, 231, 297, 357, 459, 561, 567, 591, 693, 891, 1071, 1309, 1377, 1379, 1683, 1773, 2079, 2167, 3213, 3349, 3927, 4137, 5049, 5319, 6237, 6501, 9639, 10047, 11781, 12411, 15147, 15169, 15957, 19503, 23443, 30141, 35343, 36839, 37233, 45507, 58509, 70329, 90423, 106029, 110517, 111699, 136521, 175527, 210987, 257873, 271269, 331551, 409563, 632961, 773619, 994653, 1228689, 1898883, 2320857, 2983959, 6962571, 20887713]

約数ペア:

[(1, 20887713), (3, 6962571), (7, 2983959), (9, 2320857), (11, 1898883), (17, 1228689), (21, 994653), (27, 773619), (33, 632961), (51, 409563), (63, 331551), (77, 271269), (81, 257873), (99, 210987), (119, 175527), (153, 136521), (187, 111699), (189, 110517), (197, 106029), (231, 90423), (297, 70329), (357, 58509), (459, 45507), (561, 37233), (567, 36839), (591, 35343), (693, 30141), (891, 23443), (1071, 19503), (1309, 15957), (1377, 15169), (1379, 15147), (1683, 12411), (1773, 11781), (2079, 10047), (2167, 9639), (3213, 6501), (3349, 6237), (3927, 5319), (4137, 5049)]