21000000550

素因数分解:

$2^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{881}}^1\times {\mathrm{967}}^1$

素因数の和:1906

約数の個数: 96

約数和(自身を含む): 42876630720

約数和(自身を除く): 21876630170

約数列:

[1, 2, 5, 10, 17, 25, 29, 34, 50, 58, 85, 145, 170, 290, 425, 493, 725, 850, 881, 967, 986, 1450, 1762, 1934, 2465, 4405, 4835, 4930, 8810, 9670, 12325, 14977, 16439, 22025, 24175, 24650, 25549, 28043, 29954, 32878, 44050, 48350, 51098, 56086, 74885, 82195, 127745, 140215, 149770, 164390, 255490, 280430, 374425, 410975, 434333, 476731, 638725, 701075, 748850, 821950, 851927, 868666, 953462, 1277450, 1402150, 1703854, 2171665, 2383655, 4259635, 4343330, 4767310, 8519270, 10858325, 11918275, 14482759, 21298175, 21716650, 23836550, 24705883, 28965518, 42596350, 49411766, 72413795, 123529415, 144827590, 247058830, 362068975, 420000011, 617647075, 724137950, 840000022, 1235294150, 2100000055, 4200000110, 10500000275, 21000000550]

約数ペア:

[(1, 21000000550), (2, 10500000275), (5, 4200000110), (10, 2100000055), (17, 1235294150), (25, 840000022), (29, 724137950), (34, 617647075), (50, 420000011), (58, 362068975), (85, 247058830), (145, 144827590), (170, 123529415), (290, 72413795), (425, 49411766), (493, 42596350), (725, 28965518), (850, 24705883), (881, 23836550), (967, 21716650), (986, 21298175), (1450, 14482759), (1762, 11918275), (1934, 10858325), (2465, 8519270), (4405, 4767310), (4835, 4343330), (4930, 4259635), (8810, 2383655), (9670, 2171665), (12325, 1703854), (14977, 1402150), (16439, 1277450), (22025, 953462), (24175, 868666), (24650, 851927), (25549, 821950), (28043, 748850), (29954, 701075), (32878, 638725), (44050, 476731), (48350, 434333), (51098, 410975), (56086, 374425), (74885, 280430), (82195, 255490), (127745, 164390), (140215, 149770)]