21627580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{431}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 49279104

約数和(自身を除く): 27651524

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 193, 260, 386, 431, 772, 862, 965, 1724, 1930, 2155, 2509, 3860, 4310, 5018, 5603, 8620, 10036, 11206, 12545, 22412, 25090, 28015, 50180, 56030, 83183, 112060, 166366, 332732, 415915, 831830, 1081379, 1663660, 2162758, 4325516, 5406895, 10813790, 21627580]

約数ペア:

[(1, 21627580), (2, 10813790), (4, 5406895), (5, 4325516), (10, 2162758), (13, 1663660), (20, 1081379), (26, 831830), (52, 415915), (65, 332732), (130, 166366), (193, 112060), (260, 83183), (386, 56030), (431, 50180), (772, 28015), (862, 25090), (965, 22412), (1724, 12545), (1930, 11206), (2155, 10036), (2509, 8620), (3860, 5603), (4310, 5018)]