21008545

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 6860639

約数列:

[1, 5, 23, 31, 71, 83, 115, 155, 355, 415, 713, 1633, 1909, 2201, 2573, 3565, 5893, 8165, 9545, 11005, 12865, 29465, 50623, 59179, 135539, 182683, 253115, 295895, 677695, 913415, 4201709, 21008545]

約数ペア:

[(1, 21008545), (5, 4201709), (23, 913415), (31, 677695), (71, 295895), (83, 253115), (115, 182683), (155, 135539), (355, 59179), (415, 50623), (713, 29465), (1633, 12865), (1909, 11005), (2201, 9545), (2573, 8165), (3565, 5893)]