21290260

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{313}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 47476800

約数和(自身を除く): 26186540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 179, 190, 313, 358, 380, 626, 716, 895, 1252, 1565, 1790, 3130, 3401, 3580, 5947, 6260, 6802, 11894, 13604, 17005, 23788, 29735, 34010, 56027, 59470, 68020, 112054, 118940, 224108, 280135, 560270, 1064513, 1120540, 2129026, 4258052, 5322565, 10645130, 21290260]

約数ペア:

[(1, 21290260), (2, 10645130), (4, 5322565), (5, 4258052), (10, 2129026), (19, 1120540), (20, 1064513), (38, 560270), (76, 280135), (95, 224108), (179, 118940), (190, 112054), (313, 68020), (358, 59470), (380, 56027), (626, 34010), (716, 29735), (895, 23788), (1252, 17005), (1565, 13604), (1790, 11894), (3130, 6802), (3401, 6260), (3580, 5947)]