18919915

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1237}}^1$

素因数の和:1291

約数の個数: 32

約数和(自身を含む): 28523520

約数和(自身を除く): 9603605

約数列:

[1, 5, 7, 19, 23, 35, 95, 115, 133, 161, 437, 665, 805, 1237, 2185, 3059, 6185, 8659, 15295, 23503, 28451, 43295, 117515, 142255, 164521, 199157, 540569, 822605, 995785, 2702845, 3783983, 18919915]

約数ペア:

[(1, 18919915), (5, 3783983), (7, 2702845), (19, 995785), (23, 822605), (35, 540569), (95, 199157), (115, 164521), (133, 142255), (161, 117515), (437, 43295), (665, 28451), (805, 23503), (1237, 15295), (2185, 8659), (3059, 6185)]