21388528

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^2\times {\mathrm{23}}^2$

素因数の和:99

約数の個数: 90

約数和(自身を含む): 52251864

約数和(自身を除く): 30863336

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 23, 28, 38, 46, 56, 76, 92, 112, 133, 152, 161, 184, 266, 304, 322, 361, 368, 437, 529, 532, 644, 722, 874, 1058, 1064, 1288, 1444, 1748, 2116, 2128, 2527, 2576, 2888, 3059, 3496, 3703, 4232, 5054, 5776, 6118, 6992, 7406, 8303, 8464, 10051, 10108, 12236, 14812, 16606, 20102, 20216, 24472, 29624, 33212, 40204, 40432, 48944, 58121, 59248, 66424, 70357, 80408, 116242, 132848, 140714, 160816, 190969, 232484, 281428, 381938, 464968, 562856, 763876, 929936, 1125712, 1336783, 1527752, 2673566, 3055504, 5347132, 10694264, 21388528]

約数ペア:

[(1, 21388528), (2, 10694264), (4, 5347132), (7, 3055504), (8, 2673566), (14, 1527752), (16, 1336783), (19, 1125712), (23, 929936), (28, 763876), (38, 562856), (46, 464968), (56, 381938), (76, 281428), (92, 232484), (112, 190969), (133, 160816), (152, 140714), (161, 132848), (184, 116242), (266, 80408), (304, 70357), (322, 66424), (361, 59248), (368, 58121), (437, 48944), (529, 40432), (532, 40204), (644, 33212), (722, 29624), (874, 24472), (1058, 20216), (1064, 20102), (1288, 16606), (1444, 14812), (1748, 12236), (2116, 10108), (2128, 10051), (2527, 8464), (2576, 8303), (2888, 7406), (3059, 6992), (3496, 6118), (3703, 5776), (4232, 5054)]