20784865990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2136163}}^1$

素因数の和:2136316

約数の個数: 32

約数和(自身を含む): 43065066240

約数和(自身を除く): 22280200250

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 139, 278, 695, 973, 1390, 1946, 4865, 9730, 2136163, 4272326, 10680815, 14953141, 21361630, 29906282, 74765705, 149531410, 296926657, 593853314, 1484633285, 2078486599, 2969266570, 4156973198, 10392432995, 20784865990]

約数ペア:

[(1, 20784865990), (2, 10392432995), (5, 4156973198), (7, 2969266570), (10, 2078486599), (14, 1484633285), (35, 593853314), (70, 296926657), (139, 149531410), (278, 74765705), (695, 29906282), (973, 21361630), (1390, 14953141), (1946, 10680815), (4865, 4272326), (9730, 2136163)]