21702640

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{4049}}^1$

素因数の和:4129

約数の個数: 40

約数和(自身を含む): 51224400

約数和(自身を除く): 29521760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 4049, 5360, 8098, 16196, 20245, 32392, 40490, 64784, 80980, 161960, 271283, 323920, 542566, 1085132, 1356415, 2170264, 2712830, 4340528, 5425660, 10851320, 21702640]

約数ペア:

[(1, 21702640), (2, 10851320), (4, 5425660), (5, 4340528), (8, 2712830), (10, 2170264), (16, 1356415), (20, 1085132), (40, 542566), (67, 323920), (80, 271283), (134, 161960), (268, 80980), (335, 64784), (536, 40490), (670, 32392), (1072, 20245), (1340, 16196), (2680, 8098), (4049, 5360)]