21390920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{23251}}^1$

素因数の和:23285

約数の個数: 32

約数和(自身を含む): 50224320

約数和(自身を除く): 28833400

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 23251, 46502, 93004, 116255, 186008, 232510, 465020, 534773, 930040, 1069546, 2139092, 2673865, 4278184, 5347730, 10695460, 21390920]

約数ペア:

[(1, 21390920), (2, 10695460), (4, 5347730), (5, 4278184), (8, 2673865), (10, 2139092), (20, 1069546), (23, 930040), (40, 534773), (46, 465020), (92, 232510), (115, 186008), (184, 116255), (230, 93004), (460, 46502), (920, 23251)]