19940492

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 41658624

約数和(自身を除く): 21718132

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 71, 142, 143, 284, 286, 491, 572, 781, 923, 982, 1562, 1846, 1964, 3124, 3692, 5401, 6383, 10153, 10802, 12766, 20306, 21604, 25532, 34861, 40612, 69722, 70213, 139444, 140426, 280852, 383471, 453193, 766942, 906386, 1533884, 1812772, 4985123, 9970246, 19940492]

約数ペア:

[(1, 19940492), (2, 9970246), (4, 4985123), (11, 1812772), (13, 1533884), (22, 906386), (26, 766942), (44, 453193), (52, 383471), (71, 280852), (142, 140426), (143, 139444), (284, 70213), (286, 69722), (491, 40612), (572, 34861), (781, 25532), (923, 21604), (982, 20306), (1562, 12766), (1846, 10802), (1964, 10153), (3124, 6383), (3692, 5401)]