21989552

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1489}}^1$

素因数の和:1581

約数の個数: 40

約数和(自身を含む): 46559520

約数和(自身を除く): 24569968

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1489, 1846, 2978, 3692, 5956, 7384, 11912, 14768, 19357, 23824, 38714, 77428, 105719, 154856, 211438, 309712, 422876, 845752, 1374347, 1691504, 2748694, 5497388, 10994776, 21989552]

約数ペア:

[(1, 21989552), (2, 10994776), (4, 5497388), (8, 2748694), (13, 1691504), (16, 1374347), (26, 845752), (52, 422876), (71, 309712), (104, 211438), (142, 154856), (208, 105719), (284, 77428), (568, 38714), (923, 23824), (1136, 19357), (1489, 14768), (1846, 11912), (2978, 7384), (3692, 5956)]