21242817

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13351743

約数列:

[1, 3, 9, 19, 27, 43, 57, 81, 107, 129, 171, 243, 321, 387, 513, 817, 963, 1161, 1539, 2033, 2451, 2889, 3483, 4601, 4617, 6099, 7353, 8667, 10449, 13803, 18297, 22059, 26001, 41409, 54891, 66177, 87419, 124227, 164673, 198531, 262257, 372681, 494019, 786771, 1118043, 2360313, 7080939, 21242817]

約数ペア:

[(1, 21242817), (3, 7080939), (9, 2360313), (19, 1118043), (27, 786771), (43, 494019), (57, 372681), (81, 262257), (107, 198531), (129, 164673), (171, 124227), (243, 87419), (321, 66177), (387, 54891), (513, 41409), (817, 26001), (963, 22059), (1161, 18297), (1539, 13803), (2033, 10449), (2451, 8667), (2889, 7353), (3483, 6099), (4601, 4617)]