19876451

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 25920000

約数和(自身を除く): 6043549

約数列:

[1, 7, 17, 19, 59, 119, 133, 149, 323, 413, 1003, 1043, 1121, 2261, 2533, 2831, 7021, 7847, 8791, 17731, 19057, 19817, 48127, 61537, 133399, 149447, 167029, 336889, 1046129, 1169203, 2839493, 19876451]

約数ペア:

[(1, 19876451), (7, 2839493), (17, 1169203), (19, 1046129), (59, 336889), (119, 167029), (133, 149447), (149, 133399), (323, 61537), (413, 48127), (1003, 19817), (1043, 19057), (1121, 17731), (2261, 8791), (2533, 7847), (2831, 7021)]