20999394

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2087}}^1$

素因数の和:2151

約数の個数: 48

約数和(自身を含む): 50162112

約数和(自身を除く): 29162718

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 43, 78, 86, 117, 129, 234, 258, 387, 559, 774, 1118, 1677, 2087, 3354, 4174, 5031, 6261, 10062, 12522, 18783, 27131, 37566, 54262, 81393, 89741, 162786, 179482, 244179, 269223, 488358, 538446, 807669, 1166633, 1615338, 2333266, 3499899, 6999798, 10499697, 20999394]

約数ペア:

[(1, 20999394), (2, 10499697), (3, 6999798), (6, 3499899), (9, 2333266), (13, 1615338), (18, 1166633), (26, 807669), (39, 538446), (43, 488358), (78, 269223), (86, 244179), (117, 179482), (129, 162786), (234, 89741), (258, 81393), (387, 54262), (559, 37566), (774, 27131), (1118, 18783), (1677, 12522), (2087, 10062), (3354, 6261), (4174, 5031)]