21747880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1$

素因数の和:359

約数の個数: 128

約数和(自身を含む): 63866880

約数和(自身を除く): 42119000

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 23, 28, 35, 40, 44, 46, 55, 56, 70, 77, 88, 92, 110, 115, 140, 154, 161, 184, 220, 230, 253, 280, 307, 308, 322, 385, 440, 460, 506, 614, 616, 644, 770, 805, 920, 1012, 1228, 1265, 1288, 1535, 1540, 1610, 1771, 2024, 2149, 2456, 2530, 3070, 3080, 3220, 3377, 3542, 4298, 5060, 6140, 6440, 6754, 7061, 7084, 8596, 8855, 10120, 10745, 12280, 13508, 14122, 14168, 16885, 17192, 17710, 21490, 23639, 27016, 28244, 33770, 35305, 35420, 42980, 47278, 49427, 56488, 67540, 70610, 70840, 77671, 85960, 94556, 98854, 118195, 135080, 141220, 155342, 189112, 197708, 236390, 247135, 282440, 310684, 388355, 395416, 472780, 494270, 543697, 621368, 776710, 945560, 988540, 1087394, 1553420, 1977080, 2174788, 2718485, 3106840, 4349576, 5436970, 10873940, 21747880]

約数ペア:

[(1, 21747880), (2, 10873940), (4, 5436970), (5, 4349576), (7, 3106840), (8, 2718485), (10, 2174788), (11, 1977080), (14, 1553420), (20, 1087394), (22, 988540), (23, 945560), (28, 776710), (35, 621368), (40, 543697), (44, 494270), (46, 472780), (55, 395416), (56, 388355), (70, 310684), (77, 282440), (88, 247135), (92, 236390), (110, 197708), (115, 189112), (140, 155342), (154, 141220), (161, 135080), (184, 118195), (220, 98854), (230, 94556), (253, 85960), (280, 77671), (307, 70840), (308, 70610), (322, 67540), (385, 56488), (440, 49427), (460, 47278), (506, 42980), (614, 35420), (616, 35305), (644, 33770), (770, 28244), (805, 27016), (920, 23639), (1012, 21490), (1228, 17710), (1265, 17192), (1288, 16885), (1535, 14168), (1540, 14122), (1610, 13508), (1771, 12280), (2024, 10745), (2149, 10120), (2456, 8855), (2530, 8596), (3070, 7084), (3080, 7061), (3220, 6754), (3377, 6440), (3542, 6140), (4298, 5060)]