21580720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{433}}^1$

素因数の和:542

約数の個数: 80

約数和(自身を含む): 58121280

約数和(自身を除く): 36540560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 89, 112, 140, 178, 280, 356, 433, 445, 560, 623, 712, 866, 890, 1246, 1424, 1732, 1780, 2165, 2492, 3031, 3115, 3464, 3560, 4330, 4984, 6062, 6230, 6928, 7120, 8660, 9968, 12124, 12460, 15155, 17320, 24248, 24920, 30310, 34640, 38537, 48496, 49840, 60620, 77074, 121240, 154148, 192685, 242480, 269759, 308296, 385370, 539518, 616592, 770740, 1079036, 1348795, 1541480, 2158072, 2697590, 3082960, 4316144, 5395180, 10790360, 21580720]

約数ペア:

[(1, 21580720), (2, 10790360), (4, 5395180), (5, 4316144), (7, 3082960), (8, 2697590), (10, 2158072), (14, 1541480), (16, 1348795), (20, 1079036), (28, 770740), (35, 616592), (40, 539518), (56, 385370), (70, 308296), (80, 269759), (89, 242480), (112, 192685), (140, 154148), (178, 121240), (280, 77074), (356, 60620), (433, 49840), (445, 48496), (560, 38537), (623, 34640), (712, 30310), (866, 24920), (890, 24248), (1246, 17320), (1424, 15155), (1732, 12460), (1780, 12124), (2165, 9968), (2492, 8660), (3031, 7120), (3115, 6928), (3464, 6230), (3560, 6062), (4330, 4984)]