20719504

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:176

約数の個数: 80

約数和(自身を含む): 46497024

約数和(自身を除く): 25777520

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 46, 52, 61, 71, 92, 104, 122, 142, 184, 208, 244, 284, 299, 368, 488, 568, 598, 793, 923, 976, 1136, 1196, 1403, 1586, 1633, 1846, 2392, 2806, 3172, 3266, 3692, 4331, 4784, 5612, 6344, 6532, 7384, 8662, 11224, 12688, 13064, 14768, 17324, 18239, 21229, 22448, 26128, 34648, 36478, 42458, 56303, 69296, 72956, 84916, 99613, 112606, 145912, 169832, 199226, 225212, 291824, 339664, 398452, 450424, 796904, 900848, 1294969, 1593808, 2589938, 5179876, 10359752, 20719504]

約数ペア:

[(1, 20719504), (2, 10359752), (4, 5179876), (8, 2589938), (13, 1593808), (16, 1294969), (23, 900848), (26, 796904), (46, 450424), (52, 398452), (61, 339664), (71, 291824), (92, 225212), (104, 199226), (122, 169832), (142, 145912), (184, 112606), (208, 99613), (244, 84916), (284, 72956), (299, 69296), (368, 56303), (488, 42458), (568, 36478), (598, 34648), (793, 26128), (923, 22448), (976, 21229), (1136, 18239), (1196, 17324), (1403, 14768), (1586, 13064), (1633, 12688), (1846, 11224), (2392, 8662), (2806, 7384), (3172, 6532), (3266, 6344), (3692, 5612), (4331, 4784)]