20478458

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 42239232

約数和(自身を除く): 21760774

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 53, 77, 91, 106, 143, 154, 182, 193, 286, 371, 386, 583, 689, 742, 1001, 1166, 1351, 1378, 2002, 2123, 2509, 2702, 4081, 4246, 4823, 5018, 7579, 8162, 9646, 10229, 14861, 15158, 17563, 20458, 27599, 29722, 35126, 53053, 55198, 71603, 106106, 112519, 132977, 143206, 193193, 225038, 265954, 386386, 787633, 930839, 1462747, 1575266, 1861678, 2925494, 10239229, 20478458]

約数ペア:

[(1, 20478458), (2, 10239229), (7, 2925494), (11, 1861678), (13, 1575266), (14, 1462747), (22, 930839), (26, 787633), (53, 386386), (77, 265954), (91, 225038), (106, 193193), (143, 143206), (154, 132977), (182, 112519), (193, 106106), (286, 71603), (371, 55198), (386, 53053), (583, 35126), (689, 29722), (742, 27599), (1001, 20458), (1166, 17563), (1351, 15158), (1378, 14861), (2002, 10229), (2123, 9646), (2509, 8162), (2702, 7579), (4081, 5018), (4246, 4823)]