20447648

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:254

約数の個数: 72

約数和(自身を含む): 46116000

約数和(自身を除く): 25668352

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 76, 104, 152, 169, 199, 208, 247, 304, 338, 398, 416, 494, 608, 676, 796, 988, 1352, 1592, 1976, 2587, 2704, 3184, 3211, 3781, 3952, 5174, 5408, 6368, 6422, 7562, 7904, 10348, 12844, 15124, 20696, 25688, 30248, 33631, 41392, 49153, 51376, 60496, 67262, 82784, 98306, 102752, 120992, 134524, 196612, 269048, 393224, 538096, 638989, 786448, 1076192, 1277978, 1572896, 2555956, 5111912, 10223824, 20447648]

約数ペア:

[(1, 20447648), (2, 10223824), (4, 5111912), (8, 2555956), (13, 1572896), (16, 1277978), (19, 1076192), (26, 786448), (32, 638989), (38, 538096), (52, 393224), (76, 269048), (104, 196612), (152, 134524), (169, 120992), (199, 102752), (208, 98306), (247, 82784), (304, 67262), (338, 60496), (398, 51376), (416, 49153), (494, 41392), (608, 33631), (676, 30248), (796, 25688), (988, 20696), (1352, 15124), (1592, 12844), (1976, 10348), (2587, 7904), (2704, 7562), (3184, 6422), (3211, 6368), (3781, 5408), (3952, 5174)]