21169880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3371}}^1$

素因数の和:3539

約数の個数: 32

約数和(自身を含む): 47949840

約数和(自身を除く): 26779960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3371, 6280, 6742, 13484, 16855, 26968, 33710, 67420, 134840, 529247, 1058494, 2116988, 2646235, 4233976, 5292470, 10584940, 21169880]

約数ペア:

[(1, 21169880), (2, 10584940), (4, 5292470), (5, 4233976), (8, 2646235), (10, 2116988), (20, 1058494), (40, 529247), (157, 134840), (314, 67420), (628, 33710), (785, 26968), (1256, 16855), (1570, 13484), (3140, 6742), (3371, 6280)]