20158280

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3847}}^1$

素因数の和:3989

約数の個数: 32

約数和(自身を含む): 45714240

約数和(自身を除く): 25555960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3847, 5240, 7694, 15388, 19235, 30776, 38470, 76940, 153880, 503957, 1007914, 2015828, 2519785, 4031656, 5039570, 10079140, 20158280]

約数ペア:

[(1, 20158280), (2, 10079140), (4, 5039570), (5, 4031656), (8, 2519785), (10, 2015828), (20, 1007914), (40, 503957), (131, 153880), (262, 76940), (524, 38470), (655, 30776), (1048, 19235), (1310, 15388), (2620, 7694), (3847, 5240)]