21278710

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{827}}^1$

素因数の和:948

約数の個数: 32

約数和(自身を含む): 40061952

約数和(自身を除く): 18783242

約数列:

[1, 2, 5, 10, 31, 62, 83, 155, 166, 310, 415, 827, 830, 1654, 2573, 4135, 5146, 8270, 12865, 25637, 25730, 51274, 68641, 128185, 137282, 256370, 343205, 686410, 2127871, 4255742, 10639355, 21278710]

約数ペア:

[(1, 21278710), (2, 10639355), (5, 4255742), (10, 2127871), (31, 686410), (62, 343205), (83, 256370), (155, 137282), (166, 128185), (310, 68641), (415, 51274), (827, 25730), (830, 25637), (1654, 12865), (2573, 8270), (4135, 5146)]