20281040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19501}}^1$

素因数の和:19527

約数の個数: 40

約数和(自身を含む): 50783208

約数和(自身を除く): 30502168

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19501, 39002, 78004, 97505, 156008, 195010, 253513, 312016, 390020, 507026, 780040, 1014052, 1267565, 1560080, 2028104, 2535130, 4056208, 5070260, 10140520, 20281040]

約数ペア:

[(1, 20281040), (2, 10140520), (4, 5070260), (5, 4056208), (8, 2535130), (10, 2028104), (13, 1560080), (16, 1267565), (20, 1014052), (26, 780040), (40, 507026), (52, 390020), (65, 312016), (80, 253513), (104, 195010), (130, 156008), (208, 97505), (260, 78004), (520, 39002), (1040, 19501)]