21319880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7507}}^1$

素因数の和:7589

約数の個数: 32

約数和(自身を含む): 48651840

約数和(自身を除く): 27331960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7507, 15014, 30028, 37535, 60056, 75070, 150140, 300280, 532997, 1065994, 2131988, 2664985, 4263976, 5329970, 10659940, 21319880]

約数ペア:

[(1, 21319880), (2, 10659940), (4, 5329970), (5, 4263976), (8, 2664985), (10, 2131988), (20, 1065994), (40, 532997), (71, 300280), (142, 150140), (284, 75070), (355, 60056), (568, 37535), (710, 30028), (1420, 15014), (2840, 7507)]