20686900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15913}}^1$

素因数の和:15940

約数の個数: 36

約数和(自身を含む): 48346732

約数和(自身を除く): 27659832

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15913, 31826, 63652, 79565, 159130, 206869, 318260, 397825, 413738, 795650, 827476, 1034345, 1591300, 2068690, 4137380, 5171725, 10343450, 20686900]

約数ペア:

[(1, 20686900), (2, 10343450), (4, 5171725), (5, 4137380), (10, 2068690), (13, 1591300), (20, 1034345), (25, 827476), (26, 795650), (50, 413738), (52, 397825), (65, 318260), (100, 206869), (130, 159130), (260, 79565), (325, 63652), (650, 31826), (1300, 15913)]