20459690

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^2\times {\mathrm{2129}}^1$

素因数の和:2198

約数の個数: 24

約数和(自身を含む): 38071620

約数和(自身を除く): 17611930

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 961, 1922, 2129, 4258, 4805, 9610, 10645, 21290, 65999, 131998, 329995, 659990, 2045969, 4091938, 10229845, 20459690]

約数ペア:

[(1, 20459690), (2, 10229845), (5, 4091938), (10, 2045969), (31, 659990), (62, 329995), (155, 131998), (310, 65999), (961, 21290), (1922, 10645), (2129, 9610), (4258, 4805)]