21125280

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4001}}^1$

素因数の和:4030

約数の個数: 96

約数和(自身を含む): 72612288

約数和(自身を除く): 51487008

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 32, 33, 40, 44, 48, 55, 60, 66, 80, 88, 96, 110, 120, 132, 160, 165, 176, 220, 240, 264, 330, 352, 440, 480, 528, 660, 880, 1056, 1320, 1760, 2640, 4001, 5280, 8002, 12003, 16004, 20005, 24006, 32008, 40010, 44011, 48012, 60015, 64016, 80020, 88022, 96024, 120030, 128032, 132033, 160040, 176044, 192048, 220055, 240060, 264066, 320080, 352088, 384096, 440110, 480120, 528132, 640160, 660165, 704176, 880220, 960240, 1056264, 1320330, 1408352, 1760440, 1920480, 2112528, 2640660, 3520880, 4225056, 5281320, 7041760, 10562640, 21125280]

約数ペア:

[(1, 21125280), (2, 10562640), (3, 7041760), (4, 5281320), (5, 4225056), (6, 3520880), (8, 2640660), (10, 2112528), (11, 1920480), (12, 1760440), (15, 1408352), (16, 1320330), (20, 1056264), (22, 960240), (24, 880220), (30, 704176), (32, 660165), (33, 640160), (40, 528132), (44, 480120), (48, 440110), (55, 384096), (60, 352088), (66, 320080), (80, 264066), (88, 240060), (96, 220055), (110, 192048), (120, 176044), (132, 160040), (160, 132033), (165, 128032), (176, 120030), (220, 96024), (240, 88022), (264, 80020), (330, 64016), (352, 60015), (440, 48012), (480, 44011), (528, 40010), (660, 32008), (880, 24006), (1056, 20005), (1320, 16004), (1760, 12003), (2640, 8002), (4001, 5280)]