278400520

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131321}}^1$

素因数の和:131385

約数の個数: 32

約数和(自身を含む): 638224920

約数和(自身を除く): 359824400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 131321, 262642, 525284, 656605, 1050568, 1313210, 2626420, 5252840, 6960013, 13920026, 27840052, 34800065, 55680104, 69600130, 139200260, 278400520]

約数ペア:

[(1, 278400520), (2, 139200260), (4, 69600130), (5, 55680104), (8, 34800065), (10, 27840052), (20, 13920026), (40, 6960013), (53, 5252840), (106, 2626420), (212, 1313210), (265, 1050568), (424, 656605), (530, 525284), (1060, 262642), (2120, 131321)]