21117585

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{263}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 34898688

約数和(自身を除く): 13781103

約数列:

[1, 3, 5, 15, 53, 101, 159, 263, 265, 303, 505, 789, 795, 1315, 1515, 3945, 5353, 13939, 16059, 26563, 26765, 41817, 69695, 79689, 80295, 132815, 209085, 398445, 1407839, 4223517, 7039195, 21117585]

約数ペア:

[(1, 21117585), (3, 7039195), (5, 4223517), (15, 1407839), (53, 398445), (101, 209085), (159, 132815), (263, 80295), (265, 79689), (303, 69695), (505, 41817), (789, 26765), (795, 26563), (1315, 16059), (1515, 13939), (3945, 5353)]