20997470

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8501}}^1$

素因数の和:8540

約数の個数: 32

約数和(自身を含む): 42850080

約数和(自身を除く): 21852610

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 8501, 17002, 42505, 85010, 110513, 161519, 221026, 323038, 552565, 807595, 1105130, 1615190, 2099747, 4199494, 10498735, 20997470]

約数ペア:

[(1, 20997470), (2, 10498735), (5, 4199494), (10, 2099747), (13, 1615190), (19, 1105130), (26, 807595), (38, 552565), (65, 323038), (95, 221026), (130, 161519), (190, 110513), (247, 85010), (494, 42505), (1235, 17002), (2470, 8501)]