21312135

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2143}}^1$

素因数の和:2184

約数の個数: 48

約数和(自身を含む): 42142464

約数和(自身を除く): 20830329

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2143, 3315, 6429, 9945, 10715, 19287, 27859, 32145, 36431, 83577, 96435, 109293, 139295, 182155, 250731, 327879, 417885, 473603, 546465, 1253655, 1420809, 1639395, 2368015, 4262427, 7104045, 21312135]

約数ペア:

[(1, 21312135), (3, 7104045), (5, 4262427), (9, 2368015), (13, 1639395), (15, 1420809), (17, 1253655), (39, 546465), (45, 473603), (51, 417885), (65, 327879), (85, 250731), (117, 182155), (153, 139295), (195, 109293), (221, 96435), (255, 83577), (585, 36431), (663, 32145), (765, 27859), (1105, 19287), (1989, 10715), (2143, 9945), (3315, 6429)]