20809305

素因数分解:

$3^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 41091840

約数和(自身を除く): 20282535

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 173, 243, 297, 405, 495, 519, 729, 865, 891, 1215, 1485, 1557, 1903, 2187, 2595, 2673, 3645, 4455, 4671, 5709, 7785, 8019, 9515, 10935, 13365, 14013, 17127, 23355, 24057, 28545, 40095, 42039, 51381, 70065, 85635, 120285, 126117, 154143, 210195, 256905, 378351, 462429, 630585, 770715, 1387287, 1891755, 2312145, 4161861, 6936435, 20809305]

約数ペア:

[(1, 20809305), (3, 6936435), (5, 4161861), (9, 2312145), (11, 1891755), (15, 1387287), (27, 770715), (33, 630585), (45, 462429), (55, 378351), (81, 256905), (99, 210195), (135, 154143), (165, 126117), (173, 120285), (243, 85635), (297, 70065), (405, 51381), (495, 42039), (519, 40095), (729, 28545), (865, 24057), (891, 23355), (1215, 17127), (1485, 14013), (1557, 13365), (1903, 10935), (2187, 9515), (2595, 8019), (2673, 7785), (3645, 5709), (4455, 4671)]