28705257

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23981}}^1$

素因数の和:24013

約数の個数: 24

約数和(自身を含む): 49882560

約数和(自身を除く): 21177303

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 23981, 71943, 167867, 215829, 455639, 503601, 1366917, 1510803, 3189473, 4100751, 9568419, 28705257]

約数ペア:

[(1, 28705257), (3, 9568419), (7, 4100751), (9, 3189473), (19, 1510803), (21, 1366917), (57, 503601), (63, 455639), (133, 215829), (171, 167867), (399, 71943), (1197, 23981)]