21256470

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{919}}^1$

素因数の和:1189

約数の個数: 48

約数和(自身を含む): 55542240

約数和(自身を除く): 34285770

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 257, 514, 771, 919, 1285, 1542, 1838, 2313, 2570, 2757, 3855, 4595, 4626, 5514, 7710, 8271, 9190, 11565, 13785, 16542, 23130, 27570, 41355, 82710, 236183, 472366, 708549, 1180915, 1417098, 2125647, 2361830, 3542745, 4251294, 7085490, 10628235, 21256470]

約数ペア:

[(1, 21256470), (2, 10628235), (3, 7085490), (5, 4251294), (6, 3542745), (9, 2361830), (10, 2125647), (15, 1417098), (18, 1180915), (30, 708549), (45, 472366), (90, 236183), (257, 82710), (514, 41355), (771, 27570), (919, 23130), (1285, 16542), (1542, 13785), (1838, 11565), (2313, 9190), (2570, 8271), (2757, 7710), (3855, 5514), (4595, 4626)]