21509726

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{12911}}^1$

素因数の和:12944

約数の個数: 24

約数和(自身を含む): 39743136

約数和(自身を除く): 18233410

約数列:

[1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666, 12911, 25822, 90377, 180754, 219487, 438974, 632639, 1265278, 1536409, 3072818, 10754863, 21509726]

約数ペア:

[(1, 21509726), (2, 10754863), (7, 3072818), (14, 1536409), (17, 1265278), (34, 632639), (49, 438974), (98, 219487), (119, 180754), (238, 90377), (833, 25822), (1666, 12911)]