20358160

素因数分解:

$2^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{641}}^1$

素因数の和:1051

約数の個数: 40

約数和(自身を含む): 47525976

約数和(自身を除く): 27167816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 397, 641, 794, 1282, 1588, 1985, 2564, 3176, 3205, 3970, 5128, 6352, 6410, 7940, 10256, 12820, 15880, 25640, 31760, 51280, 254477, 508954, 1017908, 1272385, 2035816, 2544770, 4071632, 5089540, 10179080, 20358160]

約数ペア:

[(1, 20358160), (2, 10179080), (4, 5089540), (5, 4071632), (8, 2544770), (10, 2035816), (16, 1272385), (20, 1017908), (40, 508954), (80, 254477), (397, 51280), (641, 31760), (794, 25640), (1282, 15880), (1588, 12820), (1985, 10256), (2564, 7940), (3176, 6410), (3205, 6352), (3970, 5128)]