209543720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73783}}^1$

素因数の和:73865

約数の個数: 32

約数和(自身を含む): 478120320

約数和(自身を除く): 268576600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 73783, 147566, 295132, 368915, 590264, 737830, 1475660, 2951320, 5238593, 10477186, 20954372, 26192965, 41908744, 52385930, 104771860, 209543720]

約数ペア:

[(1, 209543720), (2, 104771860), (4, 52385930), (5, 41908744), (8, 26192965), (10, 20954372), (20, 10477186), (40, 5238593), (71, 2951320), (142, 1475660), (284, 737830), (355, 590264), (568, 368915), (710, 295132), (1420, 147566), (2840, 73783)]