21872319

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{311}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 13710657

約数列:

[1, 3, 7, 17, 21, 51, 119, 197, 311, 357, 591, 933, 1379, 2177, 3349, 4137, 5287, 6531, 10047, 15861, 23443, 37009, 61267, 70329, 111027, 183801, 428869, 1041539, 1286607, 3124617, 7290773, 21872319]

約数ペア:

[(1, 21872319), (3, 7290773), (7, 3124617), (17, 1286607), (21, 1041539), (51, 428869), (119, 183801), (197, 111027), (311, 70329), (357, 61267), (591, 37009), (933, 23443), (1379, 15861), (2177, 10047), (3349, 6531), (4137, 5287)]