21407820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50971}}^1$

素因数の和:50990

約数の個数: 48

約数和(自身を含む): 68506368

約数和(自身を除く): 47098548

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50971, 101942, 152913, 203884, 254855, 305826, 356797, 509710, 611652, 713594, 764565, 1019420, 1070391, 1427188, 1529130, 1783985, 2140782, 3058260, 3567970, 4281564, 5351955, 7135940, 10703910, 21407820]

約数ペア:

[(1, 21407820), (2, 10703910), (3, 7135940), (4, 5351955), (5, 4281564), (6, 3567970), (7, 3058260), (10, 2140782), (12, 1783985), (14, 1529130), (15, 1427188), (20, 1070391), (21, 1019420), (28, 764565), (30, 713594), (35, 611652), (42, 509710), (60, 356797), (70, 305826), (84, 254855), (105, 203884), (140, 152913), (210, 101942), (420, 50971)]