21578271

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{281}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 34110720

約数和(自身を除く): 12532449

約数列:

[1, 3, 11, 13, 33, 39, 143, 179, 281, 429, 537, 843, 1969, 2327, 3091, 3653, 5907, 6981, 9273, 10959, 25597, 40183, 50299, 76791, 120549, 150897, 553289, 653887, 1659867, 1961661, 7192757, 21578271]

約数ペア:

[(1, 21578271), (3, 7192757), (11, 1961661), (13, 1659867), (33, 653887), (39, 553289), (143, 150897), (179, 120549), (281, 76791), (429, 50299), (537, 40183), (843, 25597), (1969, 10959), (2327, 9273), (3091, 6981), (3653, 5907)]