21451080

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25537}}^1$

素因数の和:25558

約数の個数: 64

約数和(自身を含む): 73549440

約数和(自身を除く): 52098360

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, 25537, 51074, 76611, 102148, 127685, 153222, 178759, 204296, 255370, 306444, 357518, 383055, 510740, 536277, 612888, 715036, 766110, 893795, 1021480, 1072554, 1430072, 1532220, 1787590, 2145108, 2681385, 3064440, 3575180, 4290216, 5362770, 7150360, 10725540, 21451080]

約数ペア:

[(1, 21451080), (2, 10725540), (3, 7150360), (4, 5362770), (5, 4290216), (6, 3575180), (7, 3064440), (8, 2681385), (10, 2145108), (12, 1787590), (14, 1532220), (15, 1430072), (20, 1072554), (21, 1021480), (24, 893795), (28, 766110), (30, 715036), (35, 612888), (40, 536277), (42, 510740), (56, 383055), (60, 357518), (70, 306444), (84, 255370), (105, 204296), (120, 178759), (140, 153222), (168, 127685), (210, 102148), (280, 76611), (420, 51074), (840, 25537)]