21501228

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:427

約数の個数: 96

約数和(自身を含む): 61931520

約数和(自身を除く): 40430292

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 23, 28, 31, 42, 46, 62, 69, 84, 92, 93, 124, 138, 161, 186, 217, 276, 322, 359, 372, 434, 483, 644, 651, 713, 718, 868, 966, 1077, 1302, 1426, 1436, 1932, 2139, 2154, 2513, 2604, 2852, 4278, 4308, 4991, 5026, 7539, 8257, 8556, 9982, 10052, 11129, 14973, 15078, 16514, 19964, 22258, 24771, 29946, 30156, 33028, 33387, 44516, 49542, 57799, 59892, 66774, 77903, 99084, 115598, 133548, 155806, 173397, 231196, 233709, 255967, 311612, 346794, 467418, 511934, 693588, 767901, 934836, 1023868, 1535802, 1791769, 3071604, 3583538, 5375307, 7167076, 10750614, 21501228]

約数ペア:

[(1, 21501228), (2, 10750614), (3, 7167076), (4, 5375307), (6, 3583538), (7, 3071604), (12, 1791769), (14, 1535802), (21, 1023868), (23, 934836), (28, 767901), (31, 693588), (42, 511934), (46, 467418), (62, 346794), (69, 311612), (84, 255967), (92, 233709), (93, 231196), (124, 173397), (138, 155806), (161, 133548), (186, 115598), (217, 99084), (276, 77903), (322, 66774), (359, 59892), (372, 57799), (434, 49542), (483, 44516), (644, 33387), (651, 33028), (713, 30156), (718, 29946), (868, 24771), (966, 22258), (1077, 19964), (1302, 16514), (1426, 15078), (1436, 14973), (1932, 11129), (2139, 10052), (2154, 9982), (2513, 8556), (2604, 8257), (2852, 7539), (4278, 5026), (4308, 4991)]