218366840

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{61339}}^1$

素因数の和:61439

約数の個数: 32

約数和(自身を含む): 496854000

約数和(自身を除く): 278487160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 61339, 122678, 245356, 306695, 490712, 613390, 1226780, 2453560, 5459171, 10918342, 21836684, 27295855, 43673368, 54591710, 109183420, 218366840]

約数ペア:

[(1, 218366840), (2, 109183420), (4, 54591710), (5, 43673368), (8, 27295855), (10, 21836684), (20, 10918342), (40, 5459171), (89, 2453560), (178, 1226780), (356, 613390), (445, 490712), (712, 306695), (890, 245356), (1780, 122678), (3560, 61339)]