20013525

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 41705664

約数和(自身を除く): 21692139

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 97, 105, 131, 175, 225, 291, 315, 393, 485, 525, 655, 679, 873, 917, 1179, 1455, 1575, 1965, 2037, 2425, 2751, 3275, 3395, 4365, 4585, 5895, 6111, 7275, 8253, 9825, 10185, 12707, 13755, 16975, 21825, 22925, 29475, 30555, 38121, 41265, 50925, 63535, 68775, 88949, 114363, 152775, 190605, 206325, 266847, 317675, 444745, 571815, 800541, 953025, 1334235, 2223725, 2859075, 4002705, 6671175, 20013525]

約数ペア:

[(1, 20013525), (3, 6671175), (5, 4002705), (7, 2859075), (9, 2223725), (15, 1334235), (21, 953025), (25, 800541), (35, 571815), (45, 444745), (63, 317675), (75, 266847), (97, 206325), (105, 190605), (131, 152775), (175, 114363), (225, 88949), (291, 68775), (315, 63535), (393, 50925), (485, 41265), (525, 38121), (655, 30555), (679, 29475), (873, 22925), (917, 21825), (1179, 16975), (1455, 13755), (1575, 12707), (1965, 10185), (2037, 9825), (2425, 8253), (2751, 7275), (3275, 6111), (3395, 5895), (4365, 4585)]