20964680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:135

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 35022520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 31, 40, 44, 53, 55, 58, 62, 88, 106, 110, 116, 124, 145, 155, 212, 220, 232, 248, 265, 290, 310, 319, 341, 424, 440, 530, 580, 583, 620, 638, 682, 899, 1060, 1160, 1166, 1240, 1276, 1364, 1537, 1595, 1643, 1705, 1798, 2120, 2332, 2552, 2728, 2915, 3074, 3190, 3286, 3410, 3596, 4495, 4664, 5830, 6148, 6380, 6572, 6820, 7192, 7685, 8215, 8990, 9889, 11660, 12296, 12760, 13144, 13640, 15370, 16430, 16907, 17980, 18073, 19778, 23320, 30740, 32860, 33814, 35960, 36146, 39556, 47647, 49445, 61480, 65720, 67628, 72292, 79112, 84535, 90365, 95294, 98890, 135256, 144584, 169070, 180730, 190588, 197780, 238235, 338140, 361460, 381176, 395560, 476470, 524117, 676280, 722920, 952940, 1048234, 1905880, 2096468, 2620585, 4192936, 5241170, 10482340, 20964680]

約数ペア:

[(1, 20964680), (2, 10482340), (4, 5241170), (5, 4192936), (8, 2620585), (10, 2096468), (11, 1905880), (20, 1048234), (22, 952940), (29, 722920), (31, 676280), (40, 524117), (44, 476470), (53, 395560), (55, 381176), (58, 361460), (62, 338140), (88, 238235), (106, 197780), (110, 190588), (116, 180730), (124, 169070), (145, 144584), (155, 135256), (212, 98890), (220, 95294), (232, 90365), (248, 84535), (265, 79112), (290, 72292), (310, 67628), (319, 65720), (341, 61480), (424, 49445), (440, 47647), (530, 39556), (580, 36146), (583, 35960), (620, 33814), (638, 32860), (682, 30740), (899, 23320), (1060, 19778), (1160, 18073), (1166, 17980), (1240, 16907), (1276, 16430), (1364, 15370), (1537, 13640), (1595, 13144), (1643, 12760), (1705, 12296), (1798, 11660), (2120, 9889), (2332, 8990), (2552, 8215), (2728, 7685), (2915, 7192), (3074, 6820), (3190, 6572), (3286, 6380), (3410, 6148), (3596, 5830), (4495, 4664)]