28561720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{467}}^1$

素因数の和:628

約数の個数: 64

約数和(自身を含む): 70761600

約数和(自身を除く): 42199880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 139, 220, 278, 440, 467, 556, 695, 934, 1112, 1390, 1529, 1868, 2335, 2780, 3058, 3736, 4670, 5137, 5560, 6116, 7645, 9340, 10274, 12232, 15290, 18680, 20548, 25685, 30580, 41096, 51370, 61160, 64913, 102740, 129826, 205480, 259652, 324565, 519304, 649130, 714043, 1298260, 1428086, 2596520, 2856172, 3570215, 5712344, 7140430, 14280860, 28561720]

約数ペア:

[(1, 28561720), (2, 14280860), (4, 7140430), (5, 5712344), (8, 3570215), (10, 2856172), (11, 2596520), (20, 1428086), (22, 1298260), (40, 714043), (44, 649130), (55, 519304), (88, 324565), (110, 259652), (139, 205480), (220, 129826), (278, 102740), (440, 64913), (467, 61160), (556, 51370), (695, 41096), (934, 30580), (1112, 25685), (1390, 20548), (1529, 18680), (1868, 15290), (2335, 12232), (2780, 10274), (3058, 9340), (3736, 7645), (4670, 6116), (5137, 5560)]