21696784

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{479}}^1$

素因数の和:655

約数の個数: 40

約数和(自身を含む): 44640000

約数和(自身を除く): 22943216

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 149, 152, 298, 304, 479, 596, 958, 1192, 1916, 2384, 2831, 3832, 5662, 7664, 9101, 11324, 18202, 22648, 36404, 45296, 71371, 72808, 142742, 145616, 285484, 570968, 1141936, 1356049, 2712098, 5424196, 10848392, 21696784]

約数ペア:

[(1, 21696784), (2, 10848392), (4, 5424196), (8, 2712098), (16, 1356049), (19, 1141936), (38, 570968), (76, 285484), (149, 145616), (152, 142742), (298, 72808), (304, 71371), (479, 45296), (596, 36404), (958, 22648), (1192, 18202), (1916, 11324), (2384, 9101), (2831, 7664), (3832, 5662)]