21019688

素因数分解:

$2^3\times {\mathrm{79}}^2\times {\mathrm{421}}^1$

素因数の和:585

約数の個数: 24

約数和(自身を含む): 40011930

約数和(自身を除く): 18992242

約数列:

[1, 2, 4, 8, 79, 158, 316, 421, 632, 842, 1684, 3368, 6241, 12482, 24964, 33259, 49928, 66518, 133036, 266072, 2627461, 5254922, 10509844, 21019688]

約数ペア:

[(1, 21019688), (2, 10509844), (4, 5254922), (8, 2627461), (79, 266072), (158, 133036), (316, 66518), (421, 49928), (632, 33259), (842, 24964), (1684, 12482), (3368, 6241)]