19985355

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17754165

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 127, 195, 269, 381, 585, 635, 807, 1143, 1345, 1651, 1905, 2421, 3497, 4035, 4953, 5715, 8255, 10491, 12105, 14859, 17485, 24765, 31473, 34163, 52455, 74295, 102489, 157365, 170815, 307467, 444119, 512445, 1332357, 1537335, 2220595, 3997071, 6661785, 19985355]

約数ペア:

[(1, 19985355), (3, 6661785), (5, 3997071), (9, 2220595), (13, 1537335), (15, 1332357), (39, 512445), (45, 444119), (65, 307467), (117, 170815), (127, 157365), (195, 102489), (269, 74295), (381, 52455), (585, 34163), (635, 31473), (807, 24765), (1143, 17485), (1345, 14859), (1651, 12105), (1905, 10491), (2421, 8255), (3497, 5715), (4035, 4953)]