20718243

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{617}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 37791936

約数和(自身を除く): 17073693

約数列:

[1, 3, 7, 9, 13, 21, 39, 41, 63, 91, 117, 123, 273, 287, 369, 533, 617, 819, 861, 1599, 1851, 2583, 3731, 4319, 4797, 5553, 8021, 11193, 12957, 24063, 25297, 33579, 38871, 56147, 72189, 75891, 168441, 177079, 227673, 328861, 505323, 531237, 986583, 1593711, 2302027, 2959749, 6906081, 20718243]

約数ペア:

[(1, 20718243), (3, 6906081), (7, 2959749), (9, 2302027), (13, 1593711), (21, 986583), (39, 531237), (41, 505323), (63, 328861), (91, 227673), (117, 177079), (123, 168441), (273, 75891), (287, 72189), (369, 56147), (533, 38871), (617, 33579), (819, 25297), (861, 24063), (1599, 12957), (1851, 11193), (2583, 8021), (3731, 5553), (4319, 4797)]