21761390

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:609

約数の個数: 48

約数和(自身を含む): 46170000

約数和(自身を除く): 24408610

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 89, 98, 178, 245, 445, 490, 499, 623, 890, 998, 1246, 2495, 3115, 3493, 4361, 4990, 6230, 6986, 8722, 17465, 21805, 24451, 34930, 43610, 44411, 48902, 88822, 122255, 222055, 244510, 310877, 444110, 621754, 1554385, 2176139, 3108770, 4352278, 10880695, 21761390]

約数ペア:

[(1, 21761390), (2, 10880695), (5, 4352278), (7, 3108770), (10, 2176139), (14, 1554385), (35, 621754), (49, 444110), (70, 310877), (89, 244510), (98, 222055), (178, 122255), (245, 88822), (445, 48902), (490, 44411), (499, 43610), (623, 34930), (890, 24451), (998, 21805), (1246, 17465), (2495, 8722), (3115, 6986), (3493, 6230), (4361, 4990)]