20619920

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3847}}^1$

素因数の和:3927

約数の個数: 40

約数和(自身を含む): 48669504

約数和(自身を除く): 28049584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3847, 5360, 7694, 15388, 19235, 30776, 38470, 61552, 76940, 153880, 257749, 307760, 515498, 1030996, 1288745, 2061992, 2577490, 4123984, 5154980, 10309960, 20619920]

約数ペア:

[(1, 20619920), (2, 10309960), (4, 5154980), (5, 4123984), (8, 2577490), (10, 2061992), (16, 1288745), (20, 1030996), (40, 515498), (67, 307760), (80, 257749), (134, 153880), (268, 76940), (335, 61552), (536, 38470), (670, 30776), (1072, 19235), (1340, 15388), (2680, 7694), (3847, 5360)]