20879860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2389}}^1$

素因数の和:2440

約数の個数: 48

約数和(自身を含む): 48182400

約数和(自身を除く): 27302540

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 2389, 4370, 4778, 8740, 9556, 11945, 23890, 45391, 47780, 54947, 90782, 109894, 181564, 219788, 226955, 274735, 453910, 549470, 907820, 1043993, 1098940, 2087986, 4175972, 5219965, 10439930, 20879860]

約数ペア:

[(1, 20879860), (2, 10439930), (4, 5219965), (5, 4175972), (10, 2087986), (19, 1098940), (20, 1043993), (23, 907820), (38, 549470), (46, 453910), (76, 274735), (92, 226955), (95, 219788), (115, 181564), (190, 109894), (230, 90782), (380, 54947), (437, 47780), (460, 45391), (874, 23890), (1748, 11945), (2185, 9556), (2389, 8740), (4370, 4778)]