639778928

素因数分解:

$2^4\times {\mathrm{4157}}^1\times {\mathrm{9619}}^1$

素因数の和:13784

約数の個数: 20

約数和(自身を含む): 1239998760

約数和(自身を除く): 600219832

約数列:

[1, 2, 4, 8, 16, 4157, 8314, 9619, 16628, 19238, 33256, 38476, 66512, 76952, 153904, 39986183, 79972366, 159944732, 319889464, 639778928]

約数ペア:

[(1, 639778928), (2, 319889464), (4, 159944732), (8, 79972366), (16, 39986183), (4157, 153904), (8314, 76952), (9619, 66512), (16628, 38476), (19238, 33256)]