21831285

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 43499520

約数和(自身を除く): 21668235

約数列:

[1, 3, 5, 7, 15, 19, 21, 31, 35, 57, 93, 95, 105, 133, 155, 217, 285, 353, 399, 465, 589, 651, 665, 1059, 1085, 1765, 1767, 1995, 2471, 2945, 3255, 4123, 5295, 6707, 7413, 8835, 10943, 12355, 12369, 20121, 20615, 32829, 33535, 37065, 46949, 54715, 61845, 76601, 100605, 140847, 164145, 207917, 229803, 234745, 383005, 623751, 704235, 1039585, 1149015, 1455419, 3118755, 4366257, 7277095, 21831285]

約数ペア:

[(1, 21831285), (3, 7277095), (5, 4366257), (7, 3118755), (15, 1455419), (19, 1149015), (21, 1039585), (31, 704235), (35, 623751), (57, 383005), (93, 234745), (95, 229803), (105, 207917), (133, 164145), (155, 140847), (217, 100605), (285, 76601), (353, 61845), (399, 54715), (465, 46949), (589, 37065), (651, 33535), (665, 32829), (1059, 20615), (1085, 20121), (1765, 12369), (1767, 12355), (1995, 10943), (2471, 8835), (2945, 7413), (3255, 6707), (4123, 5295)]