21315220

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{5051}}^1$

素因数の和:5271

約数の個数: 24

約数和(自身を含む): 44983008

約数和(自身を除く): 23667788

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 5051, 10102, 20204, 25255, 50510, 101020, 1065761, 2131522, 4263044, 5328805, 10657610, 21315220]

約数ペア:

[(1, 21315220), (2, 10657610), (4, 5328805), (5, 4263044), (10, 2131522), (20, 1065761), (211, 101020), (422, 50510), (844, 25255), (1055, 20204), (2110, 10102), (4220, 5051)]