21993680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3089}}^1$

素因数の和:3191

約数の個数: 40

約数和(自身を含む): 51726600

約数和(自身を除く): 29732920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3089, 3560, 6178, 7120, 12356, 15445, 24712, 30890, 49424, 61780, 123560, 247120, 274921, 549842, 1099684, 1374605, 2199368, 2749210, 4398736, 5498420, 10996840, 21993680]

約数ペア:

[(1, 21993680), (2, 10996840), (4, 5498420), (5, 4398736), (8, 2749210), (10, 2199368), (16, 1374605), (20, 1099684), (40, 549842), (80, 274921), (89, 247120), (178, 123560), (356, 61780), (445, 49424), (712, 30890), (890, 24712), (1424, 15445), (1780, 12356), (3089, 7120), (3560, 6178)]