21491888

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6427}}^1$

素因数の和:6465

約数の個数: 40

約数和(自身を含む): 47824320

約数和(自身を除く): 26332432

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 152, 176, 209, 304, 418, 836, 1672, 3344, 6427, 12854, 25708, 51416, 70697, 102832, 122113, 141394, 244226, 282788, 488452, 565576, 976904, 1131152, 1343243, 1953808, 2686486, 5372972, 10745944, 21491888]

約数ペア:

[(1, 21491888), (2, 10745944), (4, 5372972), (8, 2686486), (11, 1953808), (16, 1343243), (19, 1131152), (22, 976904), (38, 565576), (44, 488452), (76, 282788), (88, 244226), (152, 141394), (176, 122113), (209, 102832), (304, 70697), (418, 51416), (836, 25708), (1672, 12854), (3344, 6427)]