21505264

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:206

約数の個数: 80

約数和(自身を含む): 49104000

約数和(自身を除く): 27598736

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 59, 76, 88, 109, 118, 152, 176, 209, 218, 236, 304, 418, 436, 472, 649, 836, 872, 944, 1121, 1199, 1298, 1672, 1744, 2071, 2242, 2398, 2596, 3344, 4142, 4484, 4796, 5192, 6431, 8284, 8968, 9592, 10384, 12331, 12862, 16568, 17936, 19184, 22781, 24662, 25724, 33136, 45562, 49324, 51448, 70741, 91124, 98648, 102896, 122189, 141482, 182248, 197296, 244378, 282964, 364496, 488756, 565928, 977512, 1131856, 1344079, 1955024, 2688158, 5376316, 10752632, 21505264]

約数ペア:

[(1, 21505264), (2, 10752632), (4, 5376316), (8, 2688158), (11, 1955024), (16, 1344079), (19, 1131856), (22, 977512), (38, 565928), (44, 488756), (59, 364496), (76, 282964), (88, 244378), (109, 197296), (118, 182248), (152, 141482), (176, 122189), (209, 102896), (218, 98648), (236, 91124), (304, 70741), (418, 51448), (436, 49324), (472, 45562), (649, 33136), (836, 25724), (872, 24662), (944, 22781), (1121, 19184), (1199, 17936), (1298, 16568), (1672, 12862), (1744, 12331), (2071, 10384), (2242, 9592), (2398, 8968), (2596, 8284), (3344, 6431), (4142, 5192), (4484, 4796)]