16889540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 37255680

約数和(自身を除く): 20366140

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 479, 820, 860, 958, 1763, 1916, 2395, 3526, 4790, 7052, 8815, 9580, 17630, 19639, 20597, 35260, 39278, 41194, 78556, 82388, 98195, 102985, 196390, 205970, 392780, 411940, 844477, 1688954, 3377908, 4222385, 8444770, 16889540]

約数ペア:

[(1, 16889540), (2, 8444770), (4, 4222385), (5, 3377908), (10, 1688954), (20, 844477), (41, 411940), (43, 392780), (82, 205970), (86, 196390), (164, 102985), (172, 98195), (205, 82388), (215, 78556), (410, 41194), (430, 39278), (479, 35260), (820, 20597), (860, 19639), (958, 17630), (1763, 9580), (1916, 8815), (2395, 7052), (3526, 4790)]