18657880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2971}}^1$

素因数の和:3139

約数の個数: 32

約数和(自身を含む): 42261840

約数和(自身を除く): 23603960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 2971, 3140, 5942, 6280, 11884, 14855, 23768, 29710, 59420, 118840, 466447, 932894, 1865788, 2332235, 3731576, 4664470, 9328940, 18657880]

約数ペア:

[(1, 18657880), (2, 9328940), (4, 4664470), (5, 3731576), (8, 2332235), (10, 1865788), (20, 932894), (40, 466447), (157, 118840), (314, 59420), (628, 29710), (785, 23768), (1256, 14855), (1570, 11884), (2971, 6280), (3140, 5942)]