20278180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3391}}^1$

素因数の和:3436

約数の個数: 48

約数和(自身を含む): 47867904

約数和(自身を除く): 27589724

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 230, 260, 299, 460, 598, 1196, 1495, 2990, 3391, 5980, 6782, 13564, 16955, 33910, 44083, 67820, 77993, 88166, 155986, 176332, 220415, 311972, 389965, 440830, 779930, 881660, 1013909, 1559860, 2027818, 4055636, 5069545, 10139090, 20278180]

約数ペア:

[(1, 20278180), (2, 10139090), (4, 5069545), (5, 4055636), (10, 2027818), (13, 1559860), (20, 1013909), (23, 881660), (26, 779930), (46, 440830), (52, 389965), (65, 311972), (92, 220415), (115, 176332), (130, 155986), (230, 88166), (260, 77993), (299, 67820), (460, 44083), (598, 33910), (1196, 16955), (1495, 13564), (2990, 6782), (3391, 5980)]