212521771

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 294912000

約数和(自身を除く): 82390229

約数列:

[1, 7, 11, 23, 31, 49, 77, 79, 161, 217, 253, 341, 343, 539, 553, 713, 869, 1127, 1519, 1771, 1817, 2387, 2449, 3773, 3871, 4991, 6083, 7843, 7889, 10633, 12397, 12719, 16709, 17143, 19987, 26939, 27097, 34937, 42581, 54901, 56327, 86779, 89033, 116963, 120001, 139909, 188573, 244559, 298067, 384307, 394289, 619597, 623231, 840007, 979363, 1320011, 2690149, 2760023, 4337179, 6855541, 9240077, 19320161, 30360253, 212521771]

約数ペア:

[(1, 212521771), (7, 30360253), (11, 19320161), (23, 9240077), (31, 6855541), (49, 4337179), (77, 2760023), (79, 2690149), (161, 1320011), (217, 979363), (253, 840007), (341, 623231), (343, 619597), (539, 394289), (553, 384307), (713, 298067), (869, 244559), (1127, 188573), (1519, 139909), (1771, 120001), (1817, 116963), (2387, 89033), (2449, 86779), (3773, 56327), (3871, 54901), (4991, 42581), (6083, 34937), (7843, 27097), (7889, 26939), (10633, 19987), (12397, 17143), (12719, 16709)]