21781890304

素因数分解:

$2^8\times {\mathrm{109}}^1\times {\mathrm{780601}}^1$

素因数の和:780726

約数の個数: 36

約数和(自身を含む): 43877638420

約数和(自身を除く): 22095748116

約数列:

[1, 2, 4, 8, 16, 32, 64, 109, 128, 218, 256, 436, 872, 1744, 3488, 6976, 13952, 27904, 780601, 1561202, 3122404, 6244808, 12489616, 24979232, 49958464, 85085509, 99916928, 170171018, 199833856, 340342036, 680684072, 1361368144, 2722736288, 5445472576, 10890945152, 21781890304]

約数ペア:

[(1, 21781890304), (2, 10890945152), (4, 5445472576), (8, 2722736288), (16, 1361368144), (32, 680684072), (64, 340342036), (109, 199833856), (128, 170171018), (218, 99916928), (256, 85085509), (436, 49958464), (872, 24979232), (1744, 12489616), (3488, 6244808), (6976, 3122404), (13952, 1561202), (27904, 780601)]