21854287

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 28442624

約数和(自身を除く): 6588337

約数列:

[1, 7, 13, 31, 61, 91, 127, 217, 403, 427, 793, 889, 1651, 1891, 2821, 3937, 5551, 7747, 11557, 13237, 24583, 27559, 51181, 54229, 100711, 172081, 240157, 358267, 704977, 1681099, 3122041, 21854287]

約数ペア:

[(1, 21854287), (7, 3122041), (13, 1681099), (31, 704977), (61, 358267), (91, 240157), (127, 172081), (217, 100711), (403, 54229), (427, 51181), (793, 27559), (889, 24583), (1651, 13237), (1891, 11557), (2821, 7747), (3937, 5551)]