20385404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 41395200

約数和(自身を除く): 21009796

約数列:

[1, 2, 4, 13, 19, 26, 38, 47, 52, 76, 94, 188, 247, 439, 494, 611, 878, 893, 988, 1222, 1756, 1786, 2444, 3572, 5707, 8341, 11414, 11609, 16682, 20633, 22828, 23218, 33364, 41266, 46436, 82532, 108433, 216866, 268229, 392027, 433732, 536458, 784054, 1072916, 1568108, 5096351, 10192702, 20385404]

約数ペア:

[(1, 20385404), (2, 10192702), (4, 5096351), (13, 1568108), (19, 1072916), (26, 784054), (38, 536458), (47, 433732), (52, 392027), (76, 268229), (94, 216866), (188, 108433), (247, 82532), (439, 46436), (494, 41266), (611, 33364), (878, 23218), (893, 22828), (988, 20633), (1222, 16682), (1756, 11609), (1786, 11414), (2444, 8341), (3572, 5707)]