21788780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{463}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 49655424

約数和(自身を除く): 27866644

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 181, 260, 362, 463, 724, 905, 926, 1810, 1852, 2315, 2353, 3620, 4630, 4706, 6019, 9260, 9412, 11765, 12038, 23530, 24076, 30095, 47060, 60190, 83803, 120380, 167606, 335212, 419015, 838030, 1089439, 1676060, 2178878, 4357756, 5447195, 10894390, 21788780]

約数ペア:

[(1, 21788780), (2, 10894390), (4, 5447195), (5, 4357756), (10, 2178878), (13, 1676060), (20, 1089439), (26, 838030), (52, 419015), (65, 335212), (130, 167606), (181, 120380), (260, 83803), (362, 60190), (463, 47060), (724, 30095), (905, 24076), (926, 23530), (1810, 12038), (1852, 11765), (2315, 9412), (2353, 9260), (3620, 6019), (4630, 4706)]