21539115

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4091}}^1$

素因数の和:4121

約数の個数: 40

約数和(自身を含む): 41591088

約数和(自身を除く): 20051973

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 4091, 5265, 12273, 20455, 36819, 53183, 61365, 110457, 159549, 184095, 265915, 331371, 478647, 552285, 797745, 1435941, 1656855, 2393235, 4307823, 7179705, 21539115]

約数ペア:

[(1, 21539115), (3, 7179705), (5, 4307823), (9, 2393235), (13, 1656855), (15, 1435941), (27, 797745), (39, 552285), (45, 478647), (65, 331371), (81, 265915), (117, 184095), (135, 159549), (195, 110457), (351, 61365), (405, 53183), (585, 36819), (1053, 20455), (1755, 12273), (4091, 5265)]