21137278

素因数分解:

$2^1\times {\mathrm{83}}^1\times {\mathrm{223}}^1\times {\mathrm{571}}^1$

素因数の和:879

約数の個数: 16

約数和(自身を含む): 32288256

約数和(自身を除く): 11150978

約数列:

[1, 2, 83, 166, 223, 446, 571, 1142, 18509, 37018, 47393, 94786, 127333, 254666, 10568639, 21137278]

約数ペア:

[(1, 21137278), (2, 10568639), (83, 254666), (166, 127333), (223, 94786), (446, 47393), (571, 37018), (1142, 18509)]