21179756

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 45193680

約数和(自身を除く): 24013924

約数列:

[1, 2, 4, 13, 17, 19, 26, 34, 38, 52, 68, 76, 97, 169, 194, 221, 247, 323, 338, 388, 442, 494, 646, 676, 884, 988, 1261, 1292, 1649, 1843, 2522, 2873, 3211, 3298, 3686, 4199, 5044, 5746, 6422, 6596, 7372, 8398, 11492, 12844, 16393, 16796, 21437, 23959, 31331, 32786, 42874, 47918, 54587, 62662, 65572, 85748, 95836, 109174, 125324, 218348, 278681, 311467, 407303, 557362, 622934, 814606, 1114724, 1245868, 1629212, 5294939, 10589878, 21179756]

約数ペア:

[(1, 21179756), (2, 10589878), (4, 5294939), (13, 1629212), (17, 1245868), (19, 1114724), (26, 814606), (34, 622934), (38, 557362), (52, 407303), (68, 311467), (76, 278681), (97, 218348), (169, 125324), (194, 109174), (221, 95836), (247, 85748), (323, 65572), (338, 62662), (388, 54587), (442, 47918), (494, 42874), (646, 32786), (676, 31331), (884, 23959), (988, 21437), (1261, 16796), (1292, 16393), (1649, 12844), (1843, 11492), (2522, 8398), (2873, 7372), (3211, 6596), (3298, 6422), (3686, 5746), (4199, 5044)]