21395199

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 34007040

約数和(自身を除く): 12611841

約数列:

[1, 3, 7, 21, 47, 53, 141, 159, 329, 371, 409, 987, 1113, 1227, 2491, 2863, 7473, 8589, 17437, 19223, 21677, 52311, 57669, 65031, 134561, 151739, 403683, 455217, 1018819, 3056457, 7131733, 21395199]

約数ペア:

[(1, 21395199), (3, 7131733), (7, 3056457), (21, 1018819), (47, 455217), (53, 403683), (141, 151739), (159, 134561), (329, 65031), (371, 57669), (409, 52311), (987, 21677), (1113, 19223), (1227, 17437), (2491, 8589), (2863, 7473)]