20838015

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:165

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 20243025

約数列:

[1, 3, 5, 9, 11, 15, 33, 43, 45, 55, 89, 99, 121, 129, 165, 215, 267, 363, 387, 445, 473, 495, 605, 645, 801, 979, 1089, 1335, 1419, 1815, 1935, 2365, 2937, 3827, 4005, 4257, 4895, 5203, 5445, 7095, 8811, 10769, 11481, 14685, 15609, 19135, 21285, 26015, 32307, 34443, 42097, 44055, 46827, 53845, 57405, 78045, 96921, 126291, 161535, 172215, 210485, 234135, 378873, 463067, 484605, 631455, 1389201, 1894365, 2315335, 4167603, 6946005, 20838015]

約数ペア:

[(1, 20838015), (3, 6946005), (5, 4167603), (9, 2315335), (11, 1894365), (15, 1389201), (33, 631455), (43, 484605), (45, 463067), (55, 378873), (89, 234135), (99, 210485), (121, 172215), (129, 161535), (165, 126291), (215, 96921), (267, 78045), (363, 57405), (387, 53845), (445, 46827), (473, 44055), (495, 42097), (605, 34443), (645, 32307), (801, 26015), (979, 21285), (1089, 19135), (1335, 15609), (1419, 14685), (1815, 11481), (1935, 10769), (2365, 8811), (2937, 7095), (3827, 5445), (4005, 5203), (4257, 4895)]