21807980

素因数分解:

$2^2\times 5^1\times {\mathrm{283}}^1\times {\mathrm{3853}}^1$

素因数の和:4145

約数の個数: 24

約数和(自身を含む): 45970512

約数和(自身を除く): 24162532

約数列:

[1, 2, 4, 5, 10, 20, 283, 566, 1132, 1415, 2830, 3853, 5660, 7706, 15412, 19265, 38530, 77060, 1090399, 2180798, 4361596, 5451995, 10903990, 21807980]

約数ペア:

[(1, 21807980), (2, 10903990), (4, 5451995), (5, 4361596), (10, 2180798), (20, 1090399), (283, 77060), (566, 38530), (1132, 19265), (1415, 15412), (2830, 7706), (3853, 5660)]