16781920

素因数分解:

$2^5\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1979}}^1$

素因数の和:2047

約数の個数: 48

約数和(自身を含む): 40415760

約数和(自身を除く): 23633840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 80, 106, 160, 212, 265, 424, 530, 848, 1060, 1696, 1979, 2120, 3958, 4240, 7916, 8480, 9895, 15832, 19790, 31664, 39580, 63328, 79160, 104887, 158320, 209774, 316640, 419548, 524435, 839096, 1048870, 1678192, 2097740, 3356384, 4195480, 8390960, 16781920]

約数ペア:

[(1, 16781920), (2, 8390960), (4, 4195480), (5, 3356384), (8, 2097740), (10, 1678192), (16, 1048870), (20, 839096), (32, 524435), (40, 419548), (53, 316640), (80, 209774), (106, 158320), (160, 104887), (212, 79160), (265, 63328), (424, 39580), (530, 31664), (848, 19790), (1060, 15832), (1696, 9895), (1979, 8480), (2120, 7916), (3958, 4240)]