21355178

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:159

約数の個数: 48

約数和(自身を含む): 37630656

約数和(自身を除く): 16275478

約数列:

[1, 2, 13, 23, 26, 41, 46, 67, 82, 134, 169, 299, 338, 533, 598, 871, 943, 1066, 1541, 1742, 1886, 2747, 3082, 3887, 5494, 6929, 7774, 11323, 12259, 13858, 20033, 22646, 24518, 35711, 40066, 63181, 71422, 126362, 159367, 260429, 318734, 464243, 520858, 821353, 928486, 1642706, 10677589, 21355178]

約数ペア:

[(1, 21355178), (2, 10677589), (13, 1642706), (23, 928486), (26, 821353), (41, 520858), (46, 464243), (67, 318734), (82, 260429), (134, 159367), (169, 126362), (299, 71422), (338, 63181), (533, 40066), (598, 35711), (871, 24518), (943, 22646), (1066, 20033), (1541, 13858), (1742, 12259), (1886, 11323), (2747, 7774), (3082, 6929), (3887, 5494)]