20907159

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 35557632

約数和(自身を除く): 14650473

約数列:

[1, 3, 7, 13, 21, 39, 43, 91, 129, 137, 169, 273, 301, 411, 507, 559, 903, 959, 1183, 1677, 1781, 2877, 3549, 3913, 5343, 5891, 7267, 11739, 12467, 17673, 21801, 23153, 37401, 41237, 50869, 69459, 76583, 123711, 152607, 162071, 229749, 486213, 536081, 995579, 1608243, 2986737, 6969053, 20907159]

約数ペア:

[(1, 20907159), (3, 6969053), (7, 2986737), (13, 1608243), (21, 995579), (39, 536081), (43, 486213), (91, 229749), (129, 162071), (137, 152607), (169, 123711), (273, 76583), (301, 69459), (411, 50869), (507, 41237), (559, 37401), (903, 23153), (959, 21801), (1183, 17673), (1677, 12467), (1781, 11739), (2877, 7267), (3549, 5891), (3913, 5343)]