21072843

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{659}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 15992757

約数列:

[1, 3, 9, 11, 17, 19, 33, 51, 57, 99, 153, 171, 187, 209, 323, 561, 627, 659, 969, 1683, 1881, 1977, 2907, 3553, 5931, 7249, 10659, 11203, 12521, 21747, 31977, 33609, 37563, 65241, 100827, 112689, 123233, 137731, 212857, 369699, 413193, 638571, 1109097, 1239579, 1915713, 2341427, 7024281, 21072843]

約数ペア:

[(1, 21072843), (3, 7024281), (9, 2341427), (11, 1915713), (17, 1239579), (19, 1109097), (33, 638571), (51, 413193), (57, 369699), (99, 212857), (153, 137731), (171, 123233), (187, 112689), (209, 100827), (323, 65241), (561, 37563), (627, 33609), (659, 31977), (969, 21747), (1683, 12521), (1881, 11203), (1977, 10659), (2907, 7249), (3553, 5931)]