21381165

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:192

約数の個数: 80

約数和(自身を含む): 42932736

約数和(自身を除く): 21551571

約数列:

[1, 3, 5, 9, 13, 15, 27, 31, 39, 45, 65, 81, 93, 117, 131, 135, 155, 195, 279, 351, 393, 403, 405, 465, 585, 655, 837, 1053, 1179, 1209, 1395, 1703, 1755, 1965, 2015, 2511, 3537, 3627, 4061, 4185, 5109, 5265, 5895, 6045, 8515, 10611, 10881, 12183, 12555, 15327, 17685, 18135, 20305, 25545, 32643, 36549, 45981, 52793, 53055, 54405, 60915, 76635, 109647, 137943, 158379, 163215, 182745, 229905, 263965, 328941, 475137, 548235, 689715, 791895, 1425411, 1644705, 2375685, 4276233, 7127055, 21381165]

約数ペア:

[(1, 21381165), (3, 7127055), (5, 4276233), (9, 2375685), (13, 1644705), (15, 1425411), (27, 791895), (31, 689715), (39, 548235), (45, 475137), (65, 328941), (81, 263965), (93, 229905), (117, 182745), (131, 163215), (135, 158379), (155, 137943), (195, 109647), (279, 76635), (351, 60915), (393, 54405), (403, 53055), (405, 52793), (465, 45981), (585, 36549), (655, 32643), (837, 25545), (1053, 20305), (1179, 18135), (1209, 17685), (1395, 15327), (1703, 12555), (1755, 12183), (1965, 10881), (2015, 10611), (2511, 8515), (3537, 6045), (3627, 5895), (4061, 5265), (4185, 5109)]