21123315

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6803}}^1$

素因数の和:6840

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18067725

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6803, 20409, 34015, 61227, 102045, 156469, 183681, 306135, 469407, 782345, 918405, 1408221, 2347035, 4224663, 7041105, 21123315]

約数ペア:

[(1, 21123315), (3, 7041105), (5, 4224663), (9, 2347035), (15, 1408221), (23, 918405), (27, 782345), (45, 469407), (69, 306135), (115, 183681), (135, 156469), (207, 102045), (345, 61227), (621, 34015), (1035, 20409), (3105, 6803)]