21406768

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1051}}^1$

素因数の和:1145

約数の個数: 40

約数和(自身を含む): 44352320

約数和(自身を除く): 22945552

約数列:

[1, 2, 4, 8, 16, 19, 38, 67, 76, 134, 152, 268, 304, 536, 1051, 1072, 1273, 2102, 2546, 4204, 5092, 8408, 10184, 16816, 19969, 20368, 39938, 70417, 79876, 140834, 159752, 281668, 319504, 563336, 1126672, 1337923, 2675846, 5351692, 10703384, 21406768]

約数ペア:

[(1, 21406768), (2, 10703384), (4, 5351692), (8, 2675846), (16, 1337923), (19, 1126672), (38, 563336), (67, 319504), (76, 281668), (134, 159752), (152, 140834), (268, 79876), (304, 70417), (536, 39938), (1051, 20368), (1072, 19969), (1273, 16816), (2102, 10184), (2546, 8408), (4204, 5092)]