30721220

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{3499}}^1$

素因数の和:3947

約数の個数: 24

約数和(自身を含む): 64680000

約数和(自身を除く): 33958780

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 3499, 4390, 6998, 8780, 13996, 17495, 34990, 69980, 1536061, 3072122, 6144244, 7680305, 15360610, 30721220]

約数ペア:

[(1, 30721220), (2, 15360610), (4, 7680305), (5, 6144244), (10, 3072122), (20, 1536061), (439, 69980), (878, 34990), (1756, 17495), (2195, 13996), (3499, 8780), (4390, 6998)]