28658511

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 49420800

約数和(自身を除く): 20762289

約数列:

[1, 3, 7, 9, 21, 43, 63, 71, 129, 149, 213, 301, 387, 447, 497, 639, 903, 1043, 1341, 1491, 2709, 3053, 3129, 4473, 6407, 9159, 9387, 10579, 19221, 21371, 27477, 31737, 44849, 57663, 64113, 74053, 95211, 134547, 192339, 222159, 403641, 454897, 666477, 1364691, 3184279, 4094073, 9552837, 28658511]

約数ペア:

[(1, 28658511), (3, 9552837), (7, 4094073), (9, 3184279), (21, 1364691), (43, 666477), (63, 454897), (71, 403641), (129, 222159), (149, 192339), (213, 134547), (301, 95211), (387, 74053), (447, 64113), (497, 57663), (639, 44849), (903, 31737), (1043, 27477), (1341, 21371), (1491, 19221), (2709, 10579), (3053, 9387), (3129, 9159), (4473, 6407)]