20475980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6359}}^1$

素因数の和:6398

約数の個数: 48

約数和(自身を含む): 51287040

約数和(自身を除く): 30811060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6359, 12718, 25436, 31795, 44513, 63590, 89026, 127180, 146257, 178052, 222565, 292514, 445130, 585028, 731285, 890260, 1023799, 1462570, 2047598, 2925140, 4095196, 5118995, 10237990, 20475980]

約数ペア:

[(1, 20475980), (2, 10237990), (4, 5118995), (5, 4095196), (7, 2925140), (10, 2047598), (14, 1462570), (20, 1023799), (23, 890260), (28, 731285), (35, 585028), (46, 445130), (70, 292514), (92, 222565), (115, 178052), (140, 146257), (161, 127180), (230, 89026), (322, 63590), (460, 44513), (644, 31795), (805, 25436), (1610, 12718), (3220, 6359)]