21078282560

素因数分解:

$2^6\times 5^1\times {\mathrm{103}}^1\times {\mathrm{639511}}^1$

素因数の和:639631

約数の個数: 56

約数和(自身を含む): 50680046976

約数和(自身を除く): 29601764416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 160, 206, 320, 412, 515, 824, 1030, 1648, 2060, 3296, 4120, 6592, 8240, 16480, 32960, 639511, 1279022, 2558044, 3197555, 5116088, 6395110, 10232176, 12790220, 20464352, 25580440, 40928704, 51160880, 65869633, 102321760, 131739266, 204643520, 263478532, 329348165, 526957064, 658696330, 1053914128, 1317392660, 2107828256, 2634785320, 4215656512, 5269570640, 10539141280, 21078282560]

約数ペア:

[(1, 21078282560), (2, 10539141280), (4, 5269570640), (5, 4215656512), (8, 2634785320), (10, 2107828256), (16, 1317392660), (20, 1053914128), (32, 658696330), (40, 526957064), (64, 329348165), (80, 263478532), (103, 204643520), (160, 131739266), (206, 102321760), (320, 65869633), (412, 51160880), (515, 40928704), (824, 25580440), (1030, 20464352), (1648, 12790220), (2060, 10232176), (3296, 6395110), (4120, 5116088), (6592, 3197555), (8240, 2558044), (16480, 1279022), (32960, 639511)]