21094280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{463}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 51114240

約数和(自身を除く): 30019960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 67, 68, 85, 134, 136, 170, 268, 335, 340, 463, 536, 670, 680, 926, 1139, 1340, 1852, 2278, 2315, 2680, 3704, 4556, 4630, 5695, 7871, 9112, 9260, 11390, 15742, 18520, 22780, 31021, 31484, 39355, 45560, 62042, 62968, 78710, 124084, 155105, 157420, 248168, 310210, 314840, 527357, 620420, 1054714, 1240840, 2109428, 2636785, 4218856, 5273570, 10547140, 21094280]

約数ペア:

[(1, 21094280), (2, 10547140), (4, 5273570), (5, 4218856), (8, 2636785), (10, 2109428), (17, 1240840), (20, 1054714), (34, 620420), (40, 527357), (67, 314840), (68, 310210), (85, 248168), (134, 157420), (136, 155105), (170, 124084), (268, 78710), (335, 62968), (340, 62042), (463, 45560), (536, 39355), (670, 31484), (680, 31021), (926, 22780), (1139, 18520), (1340, 15742), (1852, 11390), (2278, 9260), (2315, 9112), (2680, 7871), (3704, 5695), (4556, 4630)]