19858475

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:109

約数の個数: 72

約数和(自身を含む): 32654160

約数和(自身を除く): 12795685

約数列:

[1, 5, 7, 13, 25, 29, 35, 43, 49, 65, 91, 145, 175, 203, 215, 245, 301, 325, 377, 455, 559, 637, 725, 1015, 1075, 1225, 1247, 1421, 1505, 1885, 2107, 2275, 2639, 2795, 3185, 3913, 5075, 6235, 7105, 7525, 8729, 9425, 10535, 13195, 13975, 15925, 16211, 18473, 19565, 27391, 31175, 35525, 43645, 52675, 61103, 65975, 81055, 92365, 97825, 113477, 136955, 218225, 305515, 405275, 461825, 567385, 684775, 794339, 1527575, 2836925, 3971695, 19858475]

約数ペア:

[(1, 19858475), (5, 3971695), (7, 2836925), (13, 1527575), (25, 794339), (29, 684775), (35, 567385), (43, 461825), (49, 405275), (65, 305515), (91, 218225), (145, 136955), (175, 113477), (203, 97825), (215, 92365), (245, 81055), (301, 65975), (325, 61103), (377, 52675), (455, 43645), (559, 35525), (637, 31175), (725, 27391), (1015, 19565), (1075, 18473), (1225, 16211), (1247, 15925), (1421, 13975), (1505, 13195), (1885, 10535), (2107, 9425), (2275, 8729), (2639, 7525), (2795, 7105), (3185, 6235), (3913, 5075)]