20720280

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1451}}^1$

素因数の和:1489

約数の個数: 128

約数和(自身を含む): 75271680

約数和(自身を除く): 54551400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1428, 1451, 1785, 2040, 2380, 2856, 2902, 3570, 4353, 4760, 5804, 7140, 7255, 8706, 10157, 11608, 14280, 14510, 17412, 20314, 21765, 24667, 29020, 30471, 34824, 40628, 43530, 49334, 50785, 58040, 60942, 74001, 81256, 87060, 98668, 101570, 121884, 123335, 148002, 152355, 172669, 174120, 197336, 203140, 243768, 246670, 296004, 304710, 345338, 370005, 406280, 493340, 518007, 592008, 609420, 690676, 740010, 863345, 986680, 1036014, 1218840, 1381352, 1480020, 1726690, 2072028, 2590035, 2960040, 3453380, 4144056, 5180070, 6906760, 10360140, 20720280]

約数ペア:

[(1, 20720280), (2, 10360140), (3, 6906760), (4, 5180070), (5, 4144056), (6, 3453380), (7, 2960040), (8, 2590035), (10, 2072028), (12, 1726690), (14, 1480020), (15, 1381352), (17, 1218840), (20, 1036014), (21, 986680), (24, 863345), (28, 740010), (30, 690676), (34, 609420), (35, 592008), (40, 518007), (42, 493340), (51, 406280), (56, 370005), (60, 345338), (68, 304710), (70, 296004), (84, 246670), (85, 243768), (102, 203140), (105, 197336), (119, 174120), (120, 172669), (136, 152355), (140, 148002), (168, 123335), (170, 121884), (204, 101570), (210, 98668), (238, 87060), (255, 81256), (280, 74001), (340, 60942), (357, 58040), (408, 50785), (420, 49334), (476, 43530), (510, 40628), (595, 34824), (680, 30471), (714, 29020), (840, 24667), (952, 21765), (1020, 20314), (1190, 17412), (1428, 14510), (1451, 14280), (1785, 11608), (2040, 10157), (2380, 8706), (2856, 7255), (2902, 7140), (3570, 5804), (4353, 4760)]