21190455

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 44815680

約数和(自身を除く): 23625225

約数列:

[1, 3, 5, 9, 11, 13, 15, 33, 37, 39, 45, 55, 65, 89, 99, 111, 117, 143, 165, 185, 195, 267, 333, 407, 429, 445, 481, 495, 555, 585, 715, 801, 979, 1157, 1221, 1287, 1335, 1443, 1665, 2035, 2145, 2405, 2937, 3293, 3471, 3663, 4005, 4329, 4895, 5291, 5785, 6105, 6435, 7215, 8811, 9879, 10413, 12727, 14685, 15873, 16465, 17355, 18315, 21645, 26455, 29637, 36223, 38181, 42809, 44055, 47619, 49395, 52065, 63635, 79365, 108669, 114543, 128427, 148185, 181115, 190905, 214045, 238095, 326007, 385281, 470899, 543345, 572715, 642135, 1412697, 1630035, 1926405, 2354495, 4238091, 7063485, 21190455]

約数ペア:

[(1, 21190455), (3, 7063485), (5, 4238091), (9, 2354495), (11, 1926405), (13, 1630035), (15, 1412697), (33, 642135), (37, 572715), (39, 543345), (45, 470899), (55, 385281), (65, 326007), (89, 238095), (99, 214045), (111, 190905), (117, 181115), (143, 148185), (165, 128427), (185, 114543), (195, 108669), (267, 79365), (333, 63635), (407, 52065), (429, 49395), (445, 47619), (481, 44055), (495, 42809), (555, 38181), (585, 36223), (715, 29637), (801, 26455), (979, 21645), (1157, 18315), (1221, 17355), (1287, 16465), (1335, 15873), (1443, 14685), (1665, 12727), (2035, 10413), (2145, 9879), (2405, 8811), (2937, 7215), (3293, 6435), (3471, 6105), (3663, 5785), (4005, 5291), (4329, 4895)]