20403747

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3559}}^1$

素因数の和:3592

約数の個数: 36

約数和(自身を含む): 36931440

約数和(自身を除く): 16527693

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3559, 5733, 10677, 24913, 32031, 46267, 74739, 138801, 174391, 224217, 323869, 416403, 523173, 971607, 1569519, 2267083, 2914821, 6801249, 20403747]

約数ペア:

[(1, 20403747), (3, 6801249), (7, 2914821), (9, 2267083), (13, 1569519), (21, 971607), (39, 523173), (49, 416403), (63, 323869), (91, 224217), (117, 174391), (147, 138801), (273, 74739), (441, 46267), (637, 32031), (819, 24913), (1911, 10677), (3559, 5733)]