20907796

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24815084

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 71, 91, 142, 182, 284, 364, 497, 809, 923, 994, 1618, 1846, 1988, 3236, 3692, 5663, 6461, 10517, 11326, 12922, 21034, 22652, 25844, 42068, 57439, 73619, 114878, 147238, 229756, 294476, 402073, 746707, 804146, 1493414, 1608292, 2986828, 5226949, 10453898, 20907796]

約数ペア:

[(1, 20907796), (2, 10453898), (4, 5226949), (7, 2986828), (13, 1608292), (14, 1493414), (26, 804146), (28, 746707), (52, 402073), (71, 294476), (91, 229756), (142, 147238), (182, 114878), (284, 73619), (364, 57439), (497, 42068), (809, 25844), (923, 22652), (994, 21034), (1618, 12922), (1846, 11326), (1988, 10517), (3236, 6461), (3692, 5663)]