20814928

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 41622336

約数和(自身を除く): 20807408

約数列:

[1, 2, 4, 8, 16, 71, 73, 142, 146, 251, 284, 292, 502, 568, 584, 1004, 1136, 1168, 2008, 4016, 5183, 10366, 17821, 18323, 20732, 35642, 36646, 41464, 71284, 73292, 82928, 142568, 146584, 285136, 293168, 1300933, 2601866, 5203732, 10407464, 20814928]

約数ペア:

[(1, 20814928), (2, 10407464), (4, 5203732), (8, 2601866), (16, 1300933), (71, 293168), (73, 285136), (142, 146584), (146, 142568), (251, 82928), (284, 73292), (292, 71284), (502, 41464), (568, 36646), (584, 35642), (1004, 20732), (1136, 18323), (1168, 17821), (2008, 10366), (4016, 5183)]