20777720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 48837600

約数和(自身を除く): 28059880

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 101, 139, 148, 185, 202, 278, 296, 370, 404, 505, 556, 695, 740, 808, 1010, 1112, 1390, 1480, 2020, 2780, 3737, 4040, 5143, 5560, 7474, 10286, 14039, 14948, 18685, 20572, 25715, 28078, 29896, 37370, 41144, 51430, 56156, 70195, 74740, 102860, 112312, 140390, 149480, 205720, 280780, 519443, 561560, 1038886, 2077772, 2597215, 4155544, 5194430, 10388860, 20777720]

約数ペア:

[(1, 20777720), (2, 10388860), (4, 5194430), (5, 4155544), (8, 2597215), (10, 2077772), (20, 1038886), (37, 561560), (40, 519443), (74, 280780), (101, 205720), (139, 149480), (148, 140390), (185, 112312), (202, 102860), (278, 74740), (296, 70195), (370, 56156), (404, 51430), (505, 41144), (556, 37370), (695, 29896), (740, 28078), (808, 25715), (1010, 20572), (1112, 18685), (1390, 14948), (1480, 14039), (2020, 10286), (2780, 7474), (3737, 5560), (4040, 5143)]