21674745

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{977}}^1$

素因数の和:1034

約数の個数: 48

約数和(自身を含む): 41193360

約数和(自身を除く): 19518615

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 977, 1305, 1479, 2465, 2931, 4437, 4885, 7395, 8793, 14655, 16609, 22185, 28333, 43965, 49827, 83045, 84999, 141665, 149481, 249135, 254997, 424995, 481661, 747405, 1274985, 1444983, 2408305, 4334949, 7224915, 21674745]

約数ペア:

[(1, 21674745), (3, 7224915), (5, 4334949), (9, 2408305), (15, 1444983), (17, 1274985), (29, 747405), (45, 481661), (51, 424995), (85, 254997), (87, 249135), (145, 149481), (153, 141665), (255, 84999), (261, 83045), (435, 49827), (493, 43965), (765, 28333), (977, 22185), (1305, 16609), (1479, 14655), (2465, 8793), (2931, 7395), (4437, 4885)]