21378396

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3187}}^1$

素因数の和:3250

約数の個数: 48

約数和(自身を含む): 54986624

約数和(自身を除く): 33608228

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 43, 52, 78, 86, 129, 156, 172, 258, 516, 559, 1118, 1677, 2236, 3187, 3354, 6374, 6708, 9561, 12748, 19122, 38244, 41431, 82862, 124293, 137041, 165724, 248586, 274082, 411123, 497172, 548164, 822246, 1644492, 1781533, 3563066, 5344599, 7126132, 10689198, 21378396]

約数ペア:

[(1, 21378396), (2, 10689198), (3, 7126132), (4, 5344599), (6, 3563066), (12, 1781533), (13, 1644492), (26, 822246), (39, 548164), (43, 497172), (52, 411123), (78, 274082), (86, 248586), (129, 165724), (156, 137041), (172, 124293), (258, 82862), (516, 41431), (559, 38244), (1118, 19122), (1677, 12748), (2236, 9561), (3187, 6708), (3354, 6374)]