1989988

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:113

約数の個数: 72

約数和(自身を含む): 4826304

約数和(自身を除く): 2836316

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 49, 52, 71, 77, 91, 98, 142, 143, 154, 182, 196, 284, 286, 308, 364, 497, 539, 572, 637, 781, 923, 994, 1001, 1078, 1274, 1562, 1846, 1988, 2002, 2156, 2548, 3124, 3479, 3692, 4004, 5467, 6461, 6958, 7007, 10153, 10934, 12922, 13916, 14014, 20306, 21868, 25844, 28028, 38269, 40612, 45227, 71071, 76538, 90454, 142142, 153076, 180908, 284284, 497497, 994994, 1989988]

約数ペア:

[(1, 1989988), (2, 994994), (4, 497497), (7, 284284), (11, 180908), (13, 153076), (14, 142142), (22, 90454), (26, 76538), (28, 71071), (44, 45227), (49, 40612), (52, 38269), (71, 28028), (77, 25844), (91, 21868), (98, 20306), (142, 14014), (143, 13916), (154, 12922), (182, 10934), (196, 10153), (284, 7007), (286, 6958), (308, 6461), (364, 5467), (497, 4004), (539, 3692), (572, 3479), (637, 3124), (781, 2548), (923, 2156), (994, 2002), (1001, 1988), (1078, 1846), (1274, 1562)]