19904332

素因数分解:

$2^2\times 7^1\times {\mathrm{641}}^1\times {\mathrm{1109}}^1$

素因数の和:1761

約数の個数: 24

約数和(自身を含む): 39906720

約数和(自身を除く): 20002388

約数列:

[1, 2, 4, 7, 14, 28, 641, 1109, 1282, 2218, 2564, 4436, 4487, 7763, 8974, 15526, 17948, 31052, 710869, 1421738, 2843476, 4976083, 9952166, 19904332]

約数ペア:

[(1, 19904332), (2, 9952166), (4, 4976083), (7, 2843476), (14, 1421738), (28, 710869), (641, 31052), (1109, 17948), (1282, 15526), (2218, 8974), (2564, 7763), (4436, 4487)]