20212143

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{283}}^1$

素因数の和:491

約数の個数: 32

約数和(自身を含む): 32716800

約数和(自身を除く): 12504657

約数列:

[1, 3, 7, 19, 21, 57, 133, 179, 283, 399, 537, 849, 1253, 1981, 3401, 3759, 5377, 5943, 10203, 16131, 23807, 37639, 50657, 71421, 112917, 151971, 354599, 962483, 1063797, 2887449, 6737381, 20212143]

約数ペア:

[(1, 20212143), (3, 6737381), (7, 2887449), (19, 1063797), (21, 962483), (57, 354599), (133, 151971), (179, 112917), (283, 71421), (399, 50657), (537, 37639), (849, 23807), (1253, 16131), (1981, 10203), (3401, 5943), (3759, 5377)]