81512756

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 168507864

約数和(自身を除く): 86995108

約数列:

[1, 2, 4, 13, 17, 26, 34, 41, 52, 68, 82, 164, 169, 173, 221, 338, 346, 442, 533, 676, 692, 697, 884, 1066, 1394, 2132, 2249, 2788, 2873, 2941, 4498, 5746, 5882, 6929, 7093, 8996, 9061, 11492, 11764, 13858, 14186, 18122, 27716, 28372, 29237, 36244, 38233, 58474, 76466, 92209, 116948, 117793, 120581, 152932, 184418, 235586, 241162, 368836, 471172, 482324, 497029, 994058, 1198717, 1567553, 1988116, 2397434, 3135106, 4794868, 6270212, 20378189, 40756378, 81512756]

約数ペア:

[(1, 81512756), (2, 40756378), (4, 20378189), (13, 6270212), (17, 4794868), (26, 3135106), (34, 2397434), (41, 1988116), (52, 1567553), (68, 1198717), (82, 994058), (164, 497029), (169, 482324), (173, 471172), (221, 368836), (338, 241162), (346, 235586), (442, 184418), (533, 152932), (676, 120581), (692, 117793), (697, 116948), (884, 92209), (1066, 76466), (1394, 58474), (2132, 38233), (2249, 36244), (2788, 29237), (2873, 28372), (2941, 27716), (4498, 18122), (5746, 14186), (5882, 13858), (6929, 11764), (7093, 11492), (8996, 9061)]