21556535

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 35804160

約数和(自身を除く): 14247625

約数列:

[1, 5, 7, 11, 13, 35, 55, 59, 65, 73, 77, 91, 143, 295, 365, 385, 413, 455, 511, 649, 715, 767, 803, 949, 1001, 2065, 2555, 3245, 3835, 4015, 4307, 4543, 4745, 5005, 5369, 5621, 6643, 8437, 10439, 21535, 22715, 26845, 28105, 30149, 33215, 42185, 47377, 52195, 55991, 59059, 73073, 150745, 236885, 279955, 295295, 331639, 365365, 391937, 615901, 1658195, 1959685, 3079505, 4311307, 21556535]

約数ペア:

[(1, 21556535), (5, 4311307), (7, 3079505), (11, 1959685), (13, 1658195), (35, 615901), (55, 391937), (59, 365365), (65, 331639), (73, 295295), (77, 279955), (91, 236885), (143, 150745), (295, 73073), (365, 59059), (385, 55991), (413, 52195), (455, 47377), (511, 42185), (649, 33215), (715, 30149), (767, 28105), (803, 26845), (949, 22715), (1001, 21535), (2065, 10439), (2555, 8437), (3245, 6643), (3835, 5621), (4015, 5369), (4307, 5005), (4543, 4745)]