21073780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11579}}^1$

素因数の和:11608

約数の個数: 48

約数和(自身を含む): 54472320

約数和(自身を除く): 33398540

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11579, 23158, 46316, 57895, 81053, 115790, 150527, 162106, 231580, 301054, 324212, 405265, 602108, 752635, 810530, 1053689, 1505270, 1621060, 2107378, 3010540, 4214756, 5268445, 10536890, 21073780]

約数ペア:

[(1, 21073780), (2, 10536890), (4, 5268445), (5, 4214756), (7, 3010540), (10, 2107378), (13, 1621060), (14, 1505270), (20, 1053689), (26, 810530), (28, 752635), (35, 602108), (52, 405265), (65, 324212), (70, 301054), (91, 231580), (130, 162106), (140, 150527), (182, 115790), (260, 81053), (364, 57895), (455, 46316), (910, 23158), (1820, 11579)]