256570440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305441}}^1$

素因数の和:305462

約数の個数: 64

約数和(自身を含む): 879672960

約数和(自身を除く): 623102520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 305441, 610882, 916323, 1221764, 1527205, 1832646, 2138087, 2443528, 3054410, 3665292, 4276174, 4581615, 6108820, 6414261, 7330584, 8552348, 9163230, 10690435, 12217640, 12828522, 17104696, 18326460, 21380870, 25657044, 32071305, 36652920, 42761740, 51314088, 64142610, 85523480, 128285220, 256570440]

約数ペア:

[(1, 256570440), (2, 128285220), (3, 85523480), (4, 64142610), (5, 51314088), (6, 42761740), (7, 36652920), (8, 32071305), (10, 25657044), (12, 21380870), (14, 18326460), (15, 17104696), (20, 12828522), (21, 12217640), (24, 10690435), (28, 9163230), (30, 8552348), (35, 7330584), (40, 6414261), (42, 6108820), (56, 4581615), (60, 4276174), (70, 3665292), (84, 3054410), (105, 2443528), (120, 2138087), (140, 1832646), (168, 1527205), (210, 1221764), (280, 916323), (420, 610882), (840, 305441)]