28639863

素因数分解:

$3^2\times 7^2\times {\mathrm{101}}^1\times {\mathrm{643}}^1$

素因数の和:764

約数の個数: 36

約数和(自身を含む): 48674808

約数和(自身を除く): 20034945

約数列:

[1, 3, 7, 9, 21, 49, 63, 101, 147, 303, 441, 643, 707, 909, 1929, 2121, 4501, 4949, 5787, 6363, 13503, 14847, 31507, 40509, 44541, 64943, 94521, 194829, 283563, 454601, 584487, 1363803, 3182207, 4091409, 9546621, 28639863]

約数ペア:

[(1, 28639863), (3, 9546621), (7, 4091409), (9, 3182207), (21, 1363803), (49, 584487), (63, 454601), (101, 283563), (147, 194829), (303, 94521), (441, 64943), (643, 44541), (707, 40509), (909, 31507), (1929, 14847), (2121, 13503), (4501, 6363), (4949, 5787)]