21356910

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{359}}^1\times {\mathrm{661}}^1$

素因数の和:1033

約数の個数: 48

約数和(自身を含む): 55766880

約数和(自身を除く): 34409970

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 359, 661, 718, 1077, 1322, 1795, 1983, 2154, 3231, 3305, 3590, 3966, 5385, 5949, 6462, 6610, 9915, 10770, 11898, 16155, 19830, 29745, 32310, 59490, 237299, 474598, 711897, 1186495, 1423794, 2135691, 2372990, 3559485, 4271382, 7118970, 10678455, 21356910]

約数ペア:

[(1, 21356910), (2, 10678455), (3, 7118970), (5, 4271382), (6, 3559485), (9, 2372990), (10, 2135691), (15, 1423794), (18, 1186495), (30, 711897), (45, 474598), (90, 237299), (359, 59490), (661, 32310), (718, 29745), (1077, 19830), (1322, 16155), (1795, 11898), (1983, 10770), (2154, 9915), (3231, 6610), (3305, 6462), (3590, 5949), (3966, 5385)]