128540920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{36107}}^1$

素因数の和:36207

約数の個数: 32

約数和(自身を含む): 292474800

約数和(自身を除く): 163933880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 36107, 72214, 144428, 180535, 288856, 361070, 722140, 1444280, 3213523, 6427046, 12854092, 16067615, 25708184, 32135230, 64270460, 128540920]

約数ペア:

[(1, 128540920), (2, 64270460), (4, 32135230), (5, 25708184), (8, 16067615), (10, 12854092), (20, 6427046), (40, 3213523), (89, 1444280), (178, 722140), (356, 361070), (445, 288856), (712, 180535), (890, 144428), (1780, 72214), (3560, 36107)]