21300705

素因数分解:

$3^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{1901}}^1$

素因数の和:1998

約数の個数: 32

約数和(自身を含む): 38344320

約数和(自身を除く): 17043615

約数列:

[1, 3, 5, 9, 15, 27, 45, 83, 135, 249, 415, 747, 1245, 1901, 2241, 3735, 5703, 9505, 11205, 17109, 28515, 51327, 85545, 157783, 256635, 473349, 788915, 1420047, 2366745, 4260141, 7100235, 21300705]

約数ペア:

[(1, 21300705), (3, 7100235), (5, 4260141), (9, 2366745), (15, 1420047), (27, 788915), (45, 473349), (83, 256635), (135, 157783), (249, 85545), (415, 51327), (747, 28515), (1245, 17109), (1901, 11205), (2241, 9505), (3735, 5703)]