20837980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12553}}^1$

素因数の和:12645

約数の個数: 24

約数和(自身を含む): 44290512

約数和(自身を除く): 23452532

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12553, 25106, 50212, 62765, 125530, 251060, 1041899, 2083798, 4167596, 5209495, 10418990, 20837980]

約数ペア:

[(1, 20837980), (2, 10418990), (4, 5209495), (5, 4167596), (10, 2083798), (20, 1041899), (83, 251060), (166, 125530), (332, 62765), (415, 50212), (830, 25106), (1660, 12553)]