21085735

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7944665

約数列:

[1, 5, 11, 31, 55, 83, 149, 155, 341, 415, 745, 913, 1639, 1705, 2573, 4565, 4619, 8195, 12367, 12865, 23095, 28303, 50809, 61835, 136037, 141515, 254045, 383377, 680185, 1916885, 4217147, 21085735]

約数ペア:

[(1, 21085735), (5, 4217147), (11, 1916885), (31, 680185), (55, 383377), (83, 254045), (149, 141515), (155, 136037), (341, 61835), (415, 50809), (745, 28303), (913, 23095), (1639, 12865), (1705, 12367), (2573, 8195), (4565, 4619)]