21743780

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 47328624

約数和(自身を除く): 25584844

約数列:

[1, 2, 4, 5, 10, 20, 53, 73, 106, 146, 212, 265, 281, 292, 365, 530, 562, 730, 1060, 1124, 1405, 1460, 2810, 3869, 5620, 7738, 14893, 15476, 19345, 20513, 29786, 38690, 41026, 59572, 74465, 77380, 82052, 102565, 148930, 205130, 297860, 410260, 1087189, 2174378, 4348756, 5435945, 10871890, 21743780]

約数ペア:

[(1, 21743780), (2, 10871890), (4, 5435945), (5, 4348756), (10, 2174378), (20, 1087189), (53, 410260), (73, 297860), (106, 205130), (146, 148930), (212, 102565), (265, 82052), (281, 77380), (292, 74465), (365, 59572), (530, 41026), (562, 38690), (730, 29786), (1060, 20513), (1124, 19345), (1405, 15476), (1460, 14893), (2810, 7738), (3869, 5620)]