20395940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{439}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 24843100

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 101, 115, 202, 230, 404, 439, 460, 505, 878, 1010, 1756, 2020, 2195, 2323, 4390, 4646, 8780, 9292, 10097, 11615, 20194, 23230, 40388, 44339, 46460, 50485, 88678, 100970, 177356, 201940, 221695, 443390, 886780, 1019797, 2039594, 4079188, 5098985, 10197970, 20395940]

約数ペア:

[(1, 20395940), (2, 10197970), (4, 5098985), (5, 4079188), (10, 2039594), (20, 1019797), (23, 886780), (46, 443390), (92, 221695), (101, 201940), (115, 177356), (202, 100970), (230, 88678), (404, 50485), (439, 46460), (460, 44339), (505, 40388), (878, 23230), (1010, 20194), (1756, 11615), (2020, 10097), (2195, 9292), (2323, 8780), (4390, 4646)]