21259560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25309}}^1$

素因数の和:25330

約数の個数: 64

約数和(自身を含む): 72892800

約数和(自身を除く): 51633240

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, 25309, 50618, 75927, 101236, 126545, 151854, 177163, 202472, 253090, 303708, 354326, 379635, 506180, 531489, 607416, 708652, 759270, 885815, 1012360, 1062978, 1417304, 1518540, 1771630, 2125956, 2657445, 3037080, 3543260, 4251912, 5314890, 7086520, 10629780, 21259560]

約数ペア:

[(1, 21259560), (2, 10629780), (3, 7086520), (4, 5314890), (5, 4251912), (6, 3543260), (7, 3037080), (8, 2657445), (10, 2125956), (12, 1771630), (14, 1518540), (15, 1417304), (20, 1062978), (21, 1012360), (24, 885815), (28, 759270), (30, 708652), (35, 607416), (40, 531489), (42, 506180), (56, 379635), (60, 354326), (70, 303708), (84, 253090), (105, 202472), (120, 177163), (140, 151854), (168, 126545), (210, 101236), (280, 75927), (420, 50618), (840, 25309)]