20911380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49789}}^1$

素因数の和:49808

約数の個数: 48

約数和(自身を含む): 66917760

約数和(自身を除く): 46006380

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49789, 99578, 149367, 199156, 248945, 298734, 348523, 497890, 597468, 697046, 746835, 995780, 1045569, 1394092, 1493670, 1742615, 2091138, 2987340, 3485230, 4182276, 5227845, 6970460, 10455690, 20911380]

約数ペア:

[(1, 20911380), (2, 10455690), (3, 6970460), (4, 5227845), (5, 4182276), (6, 3485230), (7, 2987340), (10, 2091138), (12, 1742615), (14, 1493670), (15, 1394092), (20, 1045569), (21, 995780), (28, 746835), (30, 697046), (35, 597468), (42, 497890), (60, 348523), (70, 298734), (84, 248945), (105, 199156), (140, 149367), (210, 99578), (420, 49789)]