20999408

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1031}}^1$

素因数の和:1125

約数の個数: 40

約数和(自身を含む): 43509120

約数和(自身を除く): 22509712

約数列:

[1, 2, 4, 8, 16, 19, 38, 67, 76, 134, 152, 268, 304, 536, 1031, 1072, 1273, 2062, 2546, 4124, 5092, 8248, 10184, 16496, 19589, 20368, 39178, 69077, 78356, 138154, 156712, 276308, 313424, 552616, 1105232, 1312463, 2624926, 5249852, 10499704, 20999408]

約数ペア:

[(1, 20999408), (2, 10499704), (4, 5249852), (8, 2624926), (16, 1312463), (19, 1105232), (38, 552616), (67, 313424), (76, 276308), (134, 156712), (152, 138154), (268, 78356), (304, 69077), (536, 39178), (1031, 20368), (1072, 19589), (1273, 16496), (2062, 10184), (2546, 8248), (4124, 5092)]