20121457408

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{31327}}^1$

素因数の和:31549

約数の個数: 72

約数和(自身を含む): 43479379328

約数和(自身を除く): 23357921920

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 193, 208, 256, 386, 416, 772, 832, 1544, 1664, 2509, 3088, 3328, 5018, 6176, 10036, 12352, 20072, 24704, 31327, 40144, 49408, 62654, 80288, 125308, 160576, 250616, 321152, 407251, 501232, 642304, 814502, 1002464, 1629004, 2004928, 3258008, 4009856, 6046111, 6516016, 8019712, 12092222, 13032032, 24184444, 26064064, 48368888, 52128128, 78599443, 96737776, 104256256, 157198886, 193475552, 314397772, 386951104, 628795544, 773902208, 1257591088, 1547804416, 2515182176, 5030364352, 10060728704, 20121457408]

約数ペア:

[(1, 20121457408), (2, 10060728704), (4, 5030364352), (8, 2515182176), (13, 1547804416), (16, 1257591088), (26, 773902208), (32, 628795544), (52, 386951104), (64, 314397772), (104, 193475552), (128, 157198886), (193, 104256256), (208, 96737776), (256, 78599443), (386, 52128128), (416, 48368888), (772, 26064064), (832, 24184444), (1544, 13032032), (1664, 12092222), (2509, 8019712), (3088, 6516016), (3328, 6046111), (5018, 4009856), (6176, 3258008), (10036, 2004928), (12352, 1629004), (20072, 1002464), (24704, 814502), (31327, 642304), (40144, 501232), (49408, 407251), (62654, 321152), (80288, 250616), (125308, 160576)]