19998712

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 38452320

約数和(自身を除く): 18453608

約数列:

[1, 2, 4, 8, 71, 137, 142, 257, 274, 284, 514, 548, 568, 1028, 1096, 2056, 9727, 18247, 19454, 35209, 36494, 38908, 70418, 72988, 77816, 140836, 145976, 281672, 2499839, 4999678, 9999356, 19998712]

約数ペア:

[(1, 19998712), (2, 9999356), (4, 4999678), (8, 2499839), (71, 281672), (137, 145976), (142, 140836), (257, 77816), (274, 72988), (284, 70418), (514, 38908), (548, 36494), (568, 35209), (1028, 19454), (1096, 18247), (2056, 9727)]