28183640

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 66074400

約数和(自身を除く): 37890760

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 137, 139, 148, 185, 274, 278, 296, 370, 548, 556, 685, 695, 740, 1096, 1112, 1370, 1390, 1480, 2740, 2780, 5069, 5143, 5480, 5560, 10138, 10286, 19043, 20276, 20572, 25345, 25715, 38086, 40552, 41144, 50690, 51430, 76172, 95215, 101380, 102860, 152344, 190430, 202760, 205720, 380860, 704591, 761720, 1409182, 2818364, 3522955, 5636728, 7045910, 14091820, 28183640]

約数ペア:

[(1, 28183640), (2, 14091820), (4, 7045910), (5, 5636728), (8, 3522955), (10, 2818364), (20, 1409182), (37, 761720), (40, 704591), (74, 380860), (137, 205720), (139, 202760), (148, 190430), (185, 152344), (274, 102860), (278, 101380), (296, 95215), (370, 76172), (548, 51430), (556, 50690), (685, 41144), (695, 40552), (740, 38086), (1096, 25715), (1112, 25345), (1370, 20572), (1390, 20276), (1480, 19043), (2740, 10286), (2780, 10138), (5069, 5560), (5143, 5480)]