21000380

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 25738564

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 71, 92, 115, 142, 230, 284, 355, 460, 643, 710, 1286, 1420, 1633, 2572, 3215, 3266, 6430, 6532, 8165, 12860, 14789, 16330, 29578, 32660, 45653, 59156, 73945, 91306, 147890, 182612, 228265, 295780, 456530, 913060, 1050019, 2100038, 4200076, 5250095, 10500190, 21000380]

約数ペア:

[(1, 21000380), (2, 10500190), (4, 5250095), (5, 4200076), (10, 2100038), (20, 1050019), (23, 913060), (46, 456530), (71, 295780), (92, 228265), (115, 182612), (142, 147890), (230, 91306), (284, 73945), (355, 59156), (460, 45653), (643, 32660), (710, 29578), (1286, 16330), (1420, 14789), (1633, 12860), (2572, 8165), (3215, 6532), (3266, 6430)]