21382556

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:750

約数の個数: 36

約数和(自身を含む): 41442912

約数和(自身を除く): 20060356

約数列:

[1, 2, 4, 13, 26, 47, 52, 94, 169, 188, 338, 611, 673, 676, 1222, 1346, 2444, 2692, 7943, 8749, 15886, 17498, 31631, 31772, 34996, 63262, 113737, 126524, 227474, 411203, 454948, 822406, 1644812, 5345639, 10691278, 21382556]

約数ペア:

[(1, 21382556), (2, 10691278), (4, 5345639), (13, 1644812), (26, 822406), (47, 454948), (52, 411203), (94, 227474), (169, 126524), (188, 113737), (338, 63262), (611, 34996), (673, 31772), (676, 31631), (1222, 17498), (1346, 15886), (2444, 8749), (2692, 7943)]